Frequently Asked Questions

OddsGuard is a free, real-time sports odds comparison service. Whenever you’re looking at a market on a supported sportsbook, we show you the same selection’s price across our feed of 75+ price sources — so you can spot the best price (and the best promotions) side by side, before you bet.

• We don’t take bets — those are placed on the sportsbook of your choice, on their site, under their terms.
• We don’t hold money — your balance lives at the sportsbook, not with us.
• We never log in to your account — we only read the odds that are already visible on the page.

If you want to see it in action, the interactive demo walks through a real sportsbook layout with the overlay running.

sportsbook.com/futures

Super Bowl Winner

Chiefs+450

+$12

Eagles+600

+2.1% EV

Bills+800

👍

Lions+900

👍

49ers+1000

+$8

Ravens+1100

👍

Bengals+1400

+0.8% EV

Cowboys+1600

+$12

Without OddsGuard

OddsGuard overlay — badges appear automatically on your sportsbook

Three steps, all of them automatic:

1. Read the page. When you visit a supported sportsbook, OddsGuard reads the odds you’re already looking at — the same numbers any logged-out visitor can see.
2. Compare. We cross-check that selection against our live feed of 75+ other price sources for the exact same market.
3. Show you the better price. If we find one, a small overlay appears right next to the original odds with the difference and a one-tap link to the cheaper book.

No sportsbook login, no balance access, no bet placement. Read the full privacy policy for what we do and don’t collect.

Anyone who bets on sports and doesn’t want to manually open six tabs to compare prices.

• Casual bettors use it to see at a glance where the same selection is priced differently — e.g. a +125 moneyline at one book vs. +110 at another.
• More experienced bettors use the comparison, filtering, and best-price tools to weigh lines across books before placing.

OddsGuard is an information tool — outcomes still depend on the bets you place and are not guaranteed.

Yes. Every product surface is free to install and use:

• The browser extension (Firefox and Safari)
• The OddsGuard app for iPhone, iPad, and Mac (the Safari extension and a built-in odds browser)
• The Windows desktop app — required for Chrome, Microsoft Edge, Brave, Opera, or Vivaldi users (see “Why no Chrome extension?” below)
• The embeddable widget for site owners

Odds comparison across 75+ price sources, bonus discovery, basic notifications, and the on-page overlay are all included at no cost.

OddsGuard earns affiliate commissions when users open a new account at a sportsbook through one of our referral links. We never charge you, and the payout you see from a sportsbook is not affected by whether you come through our link.

No. OddsGuard does not accept wagers, hold funds, or settle bets. We're a comparison and discovery tool — the actual bets are placed on the sportsbook of your choice, on that sportsbook's site, under that sportsbook's terms.

Yes. When you first install the extension or open the mobile app, you must confirm that you meet the minimum legal gambling age in your jurisdiction (18 in most regions, 21 in many US states). Viewing sports betting odds is age-restricted in many countries.

OddsGuard is available worldwide. The specific sportsbooks we surface depend on your location — we only show books that actually take bets where you are. If a sportsbook is geo-blocked in your country, it won't appear in your comparisons.

OddsGuard runs across most of the places people browse and bet today:

• Browser extension — for Firefoxand Safari (iPhone / iPad / Mac).
• Windows desktop app — a self-contained app that runs alongside any Windows browser. This is the official way to use OddsGuard on Chrome, Microsoft Edge, Brave, Opera, or Vivaldi. Install guide.
• Native iPhone / iPad / Mac app — pulls live odds from our feed in a built-in browser tab and powers the Safari extension on Apple devices.
• Free embeddable widget — for sports sites, blogs, and tipsters who want live prices on their own pages. Widget docs.

Not sure which one to install? Open our home page from the device you bet on — we automatically suggest the right install for your browser and OS.

Short version: Google’s Chrome Web Store policy doesn’t accept gambling-related extensions, so OddsGuard can’t be listed there.

Brave, Opera, and Vivaldi all draw their extensions from the Chrome Web Store too, so the same restriction applies — there’s no “sideload from us” path that would survive a future browser update.

The fix: our Windows desktop app gives Chromium users the full OddsGuard experience without an extension at all. Install it once and the comparison overlay appears alongside any browser you keep using day-to-day.

On other platforms you can still install the extension directly:

• Firefox — via the Firefox Add-ons store.
• Safari (iPhone, iPad, Mac) — via the App Store.

Open Safari

Installing OddsGuard…

draftkings.com

Extensions

OddsGuard — Sports Price…

Full access

sportsbook.com/futures

Super Bowl Winner

Chiefs+450

+$12

Eagles+600

+2.1% EV

Bills+800

👍

Lions+900

👍

49ers+1000

+$8

Ravens+1100

👍

Bengals+1400

+0.8% EV

Cowboys+1600

+$12

Without OddsGuard

OddsGuard overlay — badges appear automatically on your sportsbook

Pick the install path that matches your browser. Each one takes about a minute:

• Firefox — install from the Firefox Add-ons store. Click “Add to Firefox” and confirm the permissions prompt.
• Safari (iPhone, iPad, Mac) — install the OddsGuard app from the App Store, then turn the extension on under Settings → Safari → Extensions → OddsGuard. The app walks you through this in about three taps.
• Chrome, Microsoft Edge, Brave, Opera, or Vivaldi — install our Windows desktop app. This is the public install path we can link today for Chromium-based browsers (see “Why no Chrome extension?” in the About section).

Click the OddsGuard icon in your browser's toolbar to open the popup — that's where you'll find your notifications, a quick-links list of supported sportsbooks, account controls, and settings. Better-price indicators for individual selections appear as an inline overlay on the sportsbook page itself, right next to the odds.

When you view a betting market on a supported sportsbook, OddsGuard injects a small comparison element next to or near the odds. Each tile shows three things at a glance:

• Best price elsewhere — the highest payout currently in our comparison for the same selection across connected books.
• Delta vs. the page you’re on — how much better (or worse) the book in front of you is.
• One-tap link — opens the better book directly to the relevant market when available.

Always confirm the final price on the sportsbook’s bet slip. Odds can move between the moment we compare and the moment you place a bet, especially in live markets.

Want to hide it? Toggle the overlay off in the extension’s Options page — the quick links and notifications keep working.

Two built-in shortcuts on Chrome, Firefox, and Safari desktop:

• Ctrl+Shift+B (⌘+Shift+B on Mac) — opens the oddsguard popup.
• Alt+Shift+O (⌥+Shift+O on Mac) — toggles the price-comparison overlay.

You can re-bind or disable either chord in Chrome under chrome://extensions/shortcuts and in Firefox under about:addons → gear icon → Manage Extension Shortcuts. Safari and the iOS / Mac app don’t expose user-customisable extension shortcuts — every action sits one tap away in the popup.

OddsGuard auto-updates everywhere — there’s nothing for you to do day-to-day. We’ll also show an in-app notice when a critical update is ready. To force-check manually:

• Firefox — open about:addons, click the gear icon, and pick “Check for Updates”.
• Safari — extension updates ride along with the OddsGuard App Store app, so updating the app updates the extension.
• Windows desktop app — updates auto-install in the background; relaunch the app when prompted.

OddsGuard only requests what it actually needs to do its job:

• storage — remembers your settings and sign-in.
• tabs / activeTab — recognises when you’re on a supported sportsbook.
• content-script injection — draws the on-page overlay next to odds.
• webNavigation — detects page changes inside single-page sportsbook apps.
• alarms — schedules background price polling.
• notifications — delivers price alerts (only when you opt in).

About “all websites” on Firefox and Safari: those browsers don’t support our public install flow with per-domain prompts, so the prompt reads “all websites”. Even with that permission granted, OddsGuard only ever activates on supported sportsbook domains — no other site sees us. You can verify this in the browser’s Network tab. The full data we collect is documented in our Privacy Policy.

Open Google Play

Firefox Browser

Mozilla

Install

Installing Firefox…

addons.mozilla.org/.../oddsguard

OddsGuard

Sports Price Comparison

Add to Firefox

Add OddsGuard?

Access your data for all websites. Required to overlay odds on supported sportsbooks.

Cancel

Allow

sportsbook.com/futures

Super Bowl Winner

Chiefs+450

+$12

Eagles+600

+2.1% EV

Bills+800

👍

Lions+900

👍

49ers+1000

+$8

Ravens+1100

👍

Bengals+1400

+0.8% EV

Cowboys+1600

+$12

Without OddsGuard

OddsGuard overlay — badges appear automatically on your sportsbook

• iPhone & iPad: yes — install the OddsGuard app from the App Store. It includes the Safari extension and a built-in odds browser.
• Android: use Firefox for Android, which supports our add-on directly. A dedicated Android app is on our roadmap.

Yes. Install the extension in each Firefox profile you use, then sign in to your OddsGuard account on each one and your preferences (price format, region, themes, favourite sports, notification settings) will sync between them. Chromium-based browser users should use the Windows desktop app instead of per-profile extension installs.

The popup carries day-to-day toggles. The Options page is the full control panel.

• In the popup: sign-in, price format, theme, special offers, and notification history.
• In Options: overlay on/off, bonus notifications, Jump straight to the odds, multi-selection currency, location override, FAB visibility, and the “Replay onboarding tour” button.

Three ways to open Options: from the popup’s Quick Actions → Extension Settings; or right-click the toolbar icon → “Options”; or open your browser’s extensions page (about:addons on Firefox) → OddsGuard → Details → Extension options.

A toggle in the extension popup and Options page that controls how OddsGuard handles two-step sportsbook flows (promo landing page first, then the specific event page).

• On (default): we forward you through to the event once the landing page has loaded — you reach the line you were shopping and affiliate attribution still credits.
• Off: we stop at the promo landing page so you can choose what to do — useful if you want to read the offer terms first.

The floating action button (FAB) is an in-page quick-access menu that appears on supported sportsbook pages. Tap it to open:

• Bonuses — current promos available in your region.
• Parlay Bet Slip — the multi-selection tool for building parlays across books.
• Help & Support — direct line to our team.
• Responsible Gaming — quick links to support resources.
• Rate & Share OddsGuard — and the option to replay the onboarding tour.

Prefer the toolbar icon only? You can hide the FAB entirely from the extension’s Options page.

Yes — open the extension popup → Theme section. You’ll see two tiers:

• Free themes — default light, dark, and a small palette swap any time, on every platform.
• Premium themes — marked as Unlock. Unlock with a one-time upgrade, an active Premium subscription, or a redeem code from our team.

Unlocked themes are tied to your installation. Sign in to sync them across your devices. The same controls live in:

• Windows desktop app — top-bar settings.
• iOS / macOS app — More → Appearance.

Parlay Bet Slip — opened from the FAB or toolbar. As you browse:

• Add selections one at a time.
• See the combined odds update live.
• Compare which book gives the best total price across the legs.

Caveat: sportsbook-specific same-game-parlay prices are bespoke to each book and aren’t broadly comparable. The parlay slip works best for cross-event parlays.

Multi-Selection Currency — a setting in the extension’s Options page that tells OddsGuard which currency to display stake and return figures in when you use the slip.

Sorry to see you go. Here’s how to remove OddsGuard on every platform:

• Firefox — open about:addons, click the OddsGuard entry, then “Remove”.
• Safari (iPhone, iPad, Mac) — Settings → Safari → Extensions → OddsGuard → toggle off, or delete the OddsGuard app from your device to remove it completely.
• Windows desktop app — Windows Settings → Apps → Installed apps → OddsGuard → Uninstall.

You’ll be offered a short, optional exit survey — your feedback genuinely shapes the roadmap.

It’s a native iOS / iPadOS / macOS app that does two things:

1. Ships a Safari Web Extension — the same on-page comparison overlay you get on desktop, active whenever you browse a supported sportsbook in Safari.
2. Bundles a built-in odds browser — shop lines directly inside the app, even when you’re not actively on a sportsbook website.

The app is organised around four tabs along the bottom of the screen:

1. Activate — walks you through turning the Safari extension on and shows its current status.
2. Odds — browse live prices by sport, league, and event; tap any price to jump straight to the relevant sportsbook.
3. Bonuses — current sportsbook promotions, filtered by All / Sports / Casino, with a regional section so you only see offers available where you are.
4. More — account, appearance / themes, help & support, responsible-gambling links, legal pages, and the list of supported sportsbooks.

The Bonuses tab lists current sportsbook promotional offers, organised for fast scanning:

• Filter by All, Sports, or Casino.
• “In your region” shows offers legally available where you are.
• “Other regions” gives you context for offers elsewhere.
• Each bonus links out directly to the sportsbook.
• Pull down to refresh if you want the latest list immediately.

Offers are subject to each operator’s terms, eligibility, and wagering requirements (18+ or 21+ depending on your jurisdiction). If the extension can’t be detected on older iOS versions, the Bonuses tab still works in stand-alone mode.

Open Safari

Installing OddsGuard…

draftkings.com

Extensions

OddsGuard — Sports Price…

Full access

sportsbook.com/futures

Super Bowl Winner

Chiefs+450

+$12

Eagles+600

+2.1% EV

Bills+800

👍

Lions+900

👍

49ers+1000

+$8

Ravens+1100

👍

Bengals+1400

+0.8% EV

Cowboys+1600

+$12

Without OddsGuard

OddsGuard overlay — badges appear automatically on your sportsbook

It takes about a minute end-to-end:

1. Install the OddsGuard app from the App Store.
2. Open it once — the onboarding walks you through opening Settings → Safari → Extensions → OddsGuard.
3. Toggle the extension on.
4. Grant “All Websites” permission — Safari requires this; we still only activate on supported sportsbook domains (see “Why does the app ask for ‘All Websites’ permission?” below).
5. Visit any supported sportsbook in Safari — the floating OddsGuard button confirms it’s live.

The app’s home tab has a one-tap shortcut to the right Settings page if you ever need to revisit it.

Open Mac App Store

Installing OddsGuard…

Settings

Extensions

Extensions

OddsGuard

Sports Price Comparison

Permissions

Allow on every website you visit

Allow OddsGuard on All Websites?

OddsGuard will read content on every site you visit. It only activates on supported sportsbooks.

Cancel

Always Allow

sportsbook.com/futures

Super Bowl Winner

Chiefs+450

+$12

Eagles+600

+2.1% EV

Bills+800

👍

Lions+900

👍

49ers+1000

+$8

Ravens+1100

👍

Bengals+1400

+0.8% EV

Cowboys+1600

+$12

Without OddsGuard

OddsGuard overlay — badges appear automatically on your sportsbook

Three steps, about a minute:

1. Install the OddsGuard Mac app from the Mac App Store.
2. Open Safari → Settings → Extensions and enable OddsGuard.
3. Grant site permissions — “Always Allow on Every Website” is recommended. We still only activate on supported sportsbook domains regardless of how broadly the permission is granted.

From there, the overlay and toolbar icon work the same way they do on Safari or Firefox.

Open Mac App Store

Installing OddsGuard…

Settings

Extensions

Extensions

OddsGuard

Sports Price Comparison

Permissions

Allow on every website you visit

Allow OddsGuard on All Websites?

OddsGuard will read content on every site you visit. It only activates on supported sportsbooks.

Cancel

Always Allow

sportsbook.com/futures

Super Bowl Winner

Chiefs+450

+$12

Eagles+600

+2.1% EV

Bills+800

👍

Lions+900

👍

49ers+1000

+$8

Ravens+1100

👍

Bengals+1400

+0.8% EV

Cowboys+1600

+$12

Without OddsGuard

OddsGuard overlay — badges appear automatically on your sportsbook

Short version: it’s a Safari platform limitation, not a scope expansion on our side.

• Safari only offers two permission modes: per-site or all-sites. There’s no “just these 75 sportsbook domains” option in the middle.
• What we actually read: only the supported sportsbook domains. Even with “All Websites” granted, OddsGuard stays inert on every non-sportsbook page you visit.
• How to verify: check the supported sportsbook list on the Odds section — those are the only domains we activate on. Privacy details in our Privacy Policy.

Yes. The Odds tab is a standalone browsing surface — no sportsbook visit required.

How it works:

1. Pick a sport (e.g. NBA, NFL, soccer).
2. Pick a league and event.
3. See live prices from every supported book side-by-side.
4. Tap a price to open the sportsbook — via its native app if you have it installed, or a web view as a fallback.

You can also browse the same comparisons on the website’s Odds section.

A Home Screen widget is on the roadmap. Today, you can add the app icon or a Siri Shortcut that opens straight into the Odds tab for your favorite sport.

Open Google Play

Firefox Browser

Mozilla

Install

Installing Firefox…

addons.mozilla.org/.../oddsguard

OddsGuard

Sports Price Comparison

Add to Firefox

Add OddsGuard?

Access your data for all websites. Required to overlay odds on supported sportsbooks.

Cancel

Allow

sportsbook.com/futures

Super Bowl Winner

Chiefs+450

+$12

Eagles+600

+2.1% EV

Bills+800

👍

Lions+900

👍

49ers+1000

+$8

Ravens+1100

👍

Bengals+1400

+0.8% EV

Cowboys+1600

+$12

Without OddsGuard

OddsGuard overlay — badges appear automatically on your sportsbook

Not yet as a dedicated native app. Firefox for Android supports our add-on, which gives you the core overlay experience. A native Android app is on the roadmap.

sportsbook.com/futures

Super Bowl Winner

Chiefs+450

+$12

Eagles+600

+2.1% EV

Bills+800

👍

Lions+900

👍

49ers+1000

+$8

Ravens+1100

👍

Bengals+1400

+0.8% EV

Cowboys+1600

+$12

Without OddsGuard

OddsGuard overlay — badges appear automatically on your sportsbook

Works in

OddsGuard Desktop is a lightweight Windows app that delivers the full OddsGuard experience — including the on-page odds-comparison overlay — without needing a browser extension.

It’s the public install path for OddsGuard on Chrome, Microsoft Edge, Brave, Opera, or Vivaldi: the desktop app gives Chromium users the on-page comparison overlay without relying on a public extension listing. It’s also handy on managed / work PCs that block extensions but still allow installing desktop software.

Download & install guide →

sportsbook.com/futures

Super Bowl Winner

Chiefs+450

+$12

Eagles+600

+2.1% EV

Bills+800

👍

Lions+900

👍

49ers+1000

+$8

Ravens+1100

👍

Bengals+1400

+0.8% EV

Cowboys+1600

+$12

Without OddsGuard

OddsGuard overlay — badges appear automatically on your sportsbook

Works in

Install the OddsGuard Windows desktop app. You’ll keep using Chrome / Microsoft Edge / Brave / Opera / Vivaldi exactly as you do today — the desktop app sits alongside it and provides the on-page comparison overlay without relying on a public extension listing.

On Windows you can also choose to install Firefox as a secondary browser and use theOddsGuard extension there directly. Firefox carries our public extension path.

sportsbook.com/futures

Super Bowl Winner

Chiefs+450

+$12

Eagles+600

+2.1% EV

Bills+800

👍

Lions+900

👍

49ers+1000

+$8

Ravens+1100

👍

Bengals+1400

+0.8% EV

Cowboys+1600

+$12

Without OddsGuard

OddsGuard overlay — badges appear automatically on your sportsbook

Works in

No — pick one. Use this quick guide:

• Firefox / Safari → install the browser extension. It’s the lightest setup and auto-updates with your browser.
• Chrome / Microsoft Edge / Brave / Opera / Vivaldi → install the Windows desktop app. It runs alongside your usual browser — you don’t have to switch.
• Multiple browsers, want it everywhere → the desktop app overlays whichever Chromium browser is in front, so install once and forget it.

Either way you get the same on-page comparison overlay. See /install for direct download links.

First launch shows a short welcome flow (age check, terms, optional marketing). From there the app has three tabs:

• Connection — connect the app to your browser so it sees the page you’re on, pick a preferred sportsbook, and “Open in Browser”.
• Notifications — the same notification centre as the extension.
• Settings — display options, overlay on/off, minimum-savings threshold, region, themes, and Startup options (“Launch on Windows startup”, “Auto-connect to your browser”).

You can close the app to the system tray and right-click the tray icon to Pause / Resume without fully quitting.

OddsGuard Desktop is in early access while our Microsoft Authenticode code-signing certificate finishes reputation-building. Windows shows a SmartScreen warning on new installers until they’ve been downloaded and run enough times for Microsoft to fully trust the cert.

The fix is two clicks: “More info” → “Run anyway”. Our Install page walks through it with an animated demo so you can see exactly what to click. The warning disappears automatically once the cert is established.

Windows 10 or later (64-bit), around 150 MB of disk space, and an active internet connection. It runs unobtrusively in the background and uses minimal CPU and RAM when idle.

Mac users should use the native OddsGuard app from the Mac App Store (see the iPhone, iPad & Mac section) — it covers the desktop use case on macOS. A Linux desktop build is not currently planned; Linux users can install the Firefox add-on directly.

A drop-in embeddable widget that displays live odds comparison across our 75+ price sources directly on your own website. It's designed for sports bloggers, tipsters, content sites, and affiliates who want real-time pricing next to their articles.

Pick whichever fits your site — both work the same on the user side:

1. Iframe — copy a single <iframe> tag with your API key and affiliate ID. Fully sandboxed from your page; the simplest option for blogs and CMSes.
2. JavaScript embed — add one <script> tag and a <div> with data-* attributes for finer control (auto-sizing, theming).

Full copy-paste snippets and a live customizer are on the Widgets page.

No — the widget works without one. If you'd like per-site tracking, origin validation, and higher rate limits, you can create a free API key from your OddsGuard account under Account Settings → API Keys and pass it to the widget. Without a key, the widget still loads and shows live odds under the default public rate limits.

Yes — three layers of control:

1. Preset themes: Light, Light Blue, Warm, Earth, Dark, Navy, Emerald, Crimson.
2. Custom hex colors for background, text, accent, border, odds cells, and active-item highlights.
3. Layout & defaults: standard (with sidebar) or slim (for mobile), plus a default sport / league.

For the JavaScript embed you can also pass data-height and data-width attributes to control sizing inside your page.

Yes. Pass your affiliateId parameter and every outbound click to a sportsbook from your widget is attributed to you. Apply for the affiliate program at affiliate@oddsguard.com to get your unique ID. Widget-only integrations are welcome — no content minimums.

The widget is designed to minimise impact: it loads asynchronously and lazy-hydrates so it won't block your page's Core Web Vitals, and the iframe embed variant is fully sandboxed. The odds data itself is served from our cached API so repeat visits are fast.

The widget is free for legitimate use on a website you own or operate. You may not wrap the widget output and re-serve the data through your own API, scrape widget responses, or embed in a way that misrepresents the source of the odds. Full terms apply on sign-up.

Two answers, because the two numbers are different:

• Extension overlay: The browser / Safari extension’s on-page overlay activates on 40 specific sportsbook sites today — those are the pages where OddsGuard reads the odds you’re looking at and injects a comparison right next to them. See the full list with logos in Supported Sportsbooks.
• Price comparison feed: The prices we compare those odds against come from a broader feed of 75+ sources, including major US books (DraftKings, FanDuel, BetMGM, Caesars, BetRivers, ESPN Bet, Bovada, BetOnline), UK / European books (Bet365, William Hill, Betfair, Paddy Power, Ladbrokes, Coral, Sky Bet, Betfred, BoyleSports, Unibet, 888sport, LeoVegas, Casumo, Betsson, BetVictor, Betway, Grosvenor, and more), and exchanges / sharp books (Pinnacle, Smarkets, Novig, ProphetX, Kalshi). See the full list with logos in Comparison Sources.

Wondering which books are available where you live? See the Odds by Country directory in the footer.

Extension-integrated sportsbooks are those where OddsGuard runs the on-page overlay (reads odds from the page, places the comparison element next to them). Other books in our coverage are shown inside our popup and in-app odds browser — you'll see their prices when shopping lines, but there's no overlay when you visit their site. Both types feed the same comparison engine.

Two routes — both end up in the same place:

• Email support@oddsguard.com with the site’s name and URL.
• Or use our Contact page.

Adding a new sportsbook involves reverse-engineering its page layout and maintaining an adapter as the site evolves, so we prioritise requests by user demand, regional availability, and how stable the site’s structure is.

Yes — we only show sportsbooks legally available in your jurisdiction. If you're in New Jersey, you'll see US-licensed books; if you're in the UK, you'll see UKGC-licensed books. Your location is detected automatically from your IP, but you can manually override the region in Settings if we get it wrong.

The set of books you see in OddsGuard is filtered to those licensed in your jurisdiction. US users see operators like FanDuel, DraftKings, BetMGM, Caesars, ESPN BET and other state-licensed books; UK users see Bet365, William Hill, Ladbrokes, Sky Bet, Paddy Power and the rest of the UKGC roster; AU users see TAB, Sportsbet, Ladbrokes AU, Pointsbet AU. The exact list is determined by our regional license map — when you change your override in Settings, the available list reshuffles immediately.

No. OddsGuard only reads odds that are already visible on the page — the same odds you can see as a logged-out visitor. We never access your account, balance, or bet history.

Yes. We support Betfair Exchange, Smarkets, Novig, ProphetX, and Kalshi. For exchange prices we show the best available back price; exchange commission is noted where relevant.

OddsGuard covers the major sports worldwide:

• Basketball — NBA, NCAAB.
• American Football — NFL, NCAAF.
• Baseball — MLB.
• Ice Hockey — NHL.
• Soccer — Premier League, La Liga, Bundesliga, Champions League, MLS.
• Tennis — ATP & WTA.
• Combat — UFC.
• Golf — PGA Tour.
• Cricket — IPL & T20.
• Rugby — Six Nations.
• Motorsport — Formula 1.
• Darts — PDC.
• Plus 100+ other leagues — long-tail soccer competitions, Aussie Rules, Lacrosse, Snooker, Cycling, and more.

The exact leagues active each day are shown in the app and on the website’s Odds section.

Yes. Beyond the marquee leagues, OddsGuard covers a wide tail of regional and niche competitions:

• Long-tail soccer — 100+ leagues including MLS, Liga MX, J-League, Eredivisie, Scottish Premiership, and major continental cups.
• Individual sports — ATP / WTA Challengers, European Tour golf, PDC darts, professional snooker.
• Combat & motorsport — UFC, Bellator, PFL, top-level boxing cards, Formula 1, MotoGP.
• Cricket, rugby & international — IPL, T20 internationals, Six Nations, Rugby Premiership, Aussie Rules.

Coverage depth varies by sportsbook. The app surfaces the active books and leagues for each market so you always see what’s live in your region.

Moneyline / match winner, point spreads / handicaps, totals (over / under), draw no bet, both teams to score, double chance, correct score, and futures / outrights (championship winner, MVP, division winner). Player props and alternate lines are supported on most major US books and expanding; coverage varies by sport and book.

Yes for the majority of supported books. Live prices update more frequently and can diverge quickly between books, which is where OddsGuard is often most useful. The overlay automatically follows live-market changes.

Short answer: not the composite SGP price, but yes for the legs.

• SGP totals are proprietary. Each book uses its own correlation model, so two books pricing the same three-leg SGP rarely agree on the final number — they’re not directly comparable like-for-like.
• We compare the legs. OddsGuard compares the individual prop / spread / total prices that go into SGPs, so you can see where each leg is priced best across our coverage.
• What we don’t do (yet): compute a composite SGP price or rank books on full SGP value.

Yes. Championship winner, division / conference winner, season awards (MVP, Rookie of the Year), and tournament outrights are included where books publish them. Futures prices move less often but the gaps between books are often the largest.

Two sources, combined:

• On-page reading — for sportsbooks where we run an adapter, we read the exact odds displayed in your browser. That guarantees the comparison price matches what you’ll actually see at checkout.
• Our live feed — a continuously-updated price service that polls every supported book. It powers the comparison, the in-app odds browser, the embeddable widget, and the website’s Odds section.

On a supported sportsbook, overlays update the moment the page's odds change. In the app's odds browser and widget, live / in-play markets refresh on the order of seconds, while pre-match and deep-menu markets (e.g. futures / outrights) refresh on the order of minutes. There is no manual refresh needed.

Yes. Open the extension popup (or the app) → Settings → Price Format, and choose American, Decimal, or Fractional, or "Same as Page" to match whatever the sportsbook is using. The choice applies everywhere: overlays, popup, in-app odds, and widget.

We aim for accurate comparisons and reject stale prices aggressively, but odds can shift in the fraction of a second between our fetch and your screen — especially for live markets. Always confirm the final price on the sportsbook's own bet slip before you commit. If you spot a consistent discrepancy, please report it so we can fix our adapter.

Positive EV (expected value) is a mathematical concept: a price looks favourable when compared to an estimated “fair” probability derived from sharp-book consensus.

What the label is, and what it isn’t:

• It is an informational signal that the price is statistically interesting relative to the model.
• It isn’t a prediction, a recommendation, or a guarantee that the bet will win.

Important context:

• Individual bets can still lose.
• Short-term variance is large.
• Long-run results are never guaranteed.

Please bet responsibly and only stake what you can afford to lose. If gambling stops being fun, our Responsible Gaming page has free, independent support resources.

The short version: arbitrage describes situations where opposite outcomes of the same market are priced highly enough across different books that the combined stakes could, in theory, lock in a small mathematical edge.

The reality is messier. Real-world arbitrage carries material risks:

1. Voided bets. Sportsbooks can void wagers under palpable-error rules, leaving you exposed on the other side.
2. Stake limits. Maximum-stake caps may prevent you from placing a full position before the price moves.
3. Rule mismatches. Push / overtime / void policies differ between books, which can break the supposed lock.
4. Speed. Prices move fast — by the time you place leg two, the edge can be gone or reversed.

OddsGuard does not currently provide user-facing arbitrage alerts. This explainer is educational only, no outcome is guaranteed, and you should never stake more than you can afford to lose. See our Responsible Gaming page for safer-betting resources.

What it is: how a price or point-spread changes at a sportsbook over time — e.g. a spread moving from -3 to -3.5.

Common drivers of big moves:

• Injuries or team news
• Weather updates (especially outdoor sports)
• Heavy one-sided betting
• Sharp-money positions taken at certain books

Useful caveat: tracking movement is good context for how the market has evolved. It does not predict future movement or game outcomes — past performance is not a guarantee of anything.

OddsGuard does not currently publish user-facing line-history charts. Paid tiers may add this — see Pricing for current scope.

No. The extension, mobile app, and widget all work anonymously. Signed-in accounts sync eligible preferences (like your selected theme) across devices and keep a longer notification history.

Click the OddsGuard toolbar icon → "Sign In". You'll be sent to our website to authenticate with your email and password. Once done, the extension links to your account automatically. On mobile, the sign-in flow is in the More tab of the app.

On the sign-in page click "Forgot password" and enter your email. We'll send a reset link valid for 1 hour. If it doesn't arrive, check spam and verify you're using the same email you signed up with.

Yes. Sign in with the same account on each device — browser extension, iPhone, iPad, Mac, or Windows desktop — and your preferences sync automatically:

• Price/odds format and “Same as page” setting
• Region / location override
• Notification preferences and history
• Favourite sports and leagues
• Unlocked themes and the active theme

Each installation keeps its own anonymous installation ID for technical reasons, but they all link to your account when you sign in. Manage everything from Account Settings.

Open the extension popup (or app), tap your profile, and choose "Sign Out". The device returns to anonymous mode. Your account data stays intact on our servers and will resync when you sign in again.

Two paths, depending on whether you have an account:

1. Signed-in account: Go to Account Settings → Data & Privacy → Delete Account. This removes your profile, saved preferences, and notification history.
2. No account / extension only: Use our data-deletion page — no sign-in required.

Some records may be retained temporarily for legal compliance — see Privacy Policy for the full list of retention windows.

OddsGuard groups notifications into three categories:

• System messages — critical updates and required actions. Always on.
• Price alerts — we’ve seen a better price at another book for a market you’re on or have flagged.
• Special offer notifications — optional marketing about promos, new sportsbooks, and product launches. Off by default; toggle any time from the popup under Notification Preferences.

Optional marketing alerts. Off by default — you choose whether to opt in. They’re completely separate from system notifications, so opting out never silences anything required.

What you might see:

• Promotional offers from sportsbooks (bonus bets, deposit boosts, odds boosts, free-to-play contests).
• New sportsbooks we’ve added to the comparison.
• Product launches (new platforms, new features, beta access).

Each offer is subject to the issuing sportsbook’s terms, eligibility, and where applicable wagering requirements. 18+ or 21+ depending on your jurisdiction. See our Responsible Gaming page if you’d rather block these entirely.

To toggle: open the extension popup → Notification Preferences.

On first install: you can opt in to Special offer notifications. They’re unchecked by default, so doing nothing means you stay opted out.

To change later:

1. Open the extension popup.
2. Go to Settings → Notification Preferences.
3. Toggle Special offer notifications.

Note: system notifications (critical updates, security) cannot be disabled. Only marketing-style alerts are opt-in.

Two retention windows, depending on whether you’re signed in:

• Guest (not signed in): 7 days, rolling.
• Signed-in: 1 year. You can scroll back through past price alerts and system notices for reference.

Full retention details for every data type are in our Privacy Policy.

Click the OddsGuard toolbar icon → Notifications tab. Each entry shows delivery status (seen / unseen), type, and the related sportsbook / market where applicable.

Yes for native OS-level pop-ups. Your browser will prompt you on first use. If you declined earlier, open your browser's site permissions and allow notifications from the extension, or from our website for web-push alerts.

Only what we genuinely need to provide the service:

• An anonymous installation UUID (no name, no identity).
• Browser type and version, OS, and device type.
• Country and state/region — so we surface the right sportsbooks.
• Your preferences (price format, theme, region overrides, etc.).
• Usage events on supported sportsbook sites only.
• Affiliate click tracking.
• Notification delivery status.
• If you sign in: just the email on your account — nothing else.

We do not collect your general browsing, and we never sell personal data. The full breakdown lives in our Privacy Policy.

No. The extension is only active on supported sportsbook domains. On every other site you visit, OddsGuard does nothing — no scripts run, no data is sent. You can verify this in your browser's Network tab.

Your Installation ID (also shown as "App ID") is a random UUID assigned to your extension install at first launch. It identifies your installation to our servers without identifying you personally. Find it: open the extension popup → scroll to the footer → "ID: xxxxxxxx..." — click to copy the full ID. On mobile: Settings tab → About → Installation ID.

At install time: your anonymous Installation UUID, browser type and version, OS, your country and state/region (from IP, for showing relevant prices), and your consent choices (age confirmation, marketing opt-in). Nothing about your identity, and no browsing history.

Yes. Transport is HTTPS-only (TLS 1.2+). Sensitive data is encrypted at rest. Passwords are hashed using modern algorithms. We never store credentials for any sportsbook — OddsGuard only observes the odds data visible on the page and never touches your sportsbook login.

No. We do not sell, rent, or share personal data with third parties for their marketing purposes.

Our revenue comes from sportsbook affiliate commissions when users open a new account through our links — not from selling user data. Full detail is in our Privacy Policy.

Essential cookies for sign-in and preferences on the website. Analytics cookies to understand aggregate usage (opt-out available via the cookie banner). No third-party advertising cookies. Inside the extension, no traditional browser cookies are used — local preferences live in browser.storage.

On first install we ask you to confirm you meet the minimum legal gambling age in your jurisdiction (18 in most regions, 21 in many US states). If you decline, the extension stays in a disabled state. You must be over the legal age in your region to use OddsGuard.

Yes — every platform has a quick-pause control. OddsGuard doesn’t take bets, so “pausing” just removes the overlay and notifications:

• Windows desktop app: right-click the OddsGuard tray icon → Pause. Click Resume when you want it back.
• Firefox: open about:addons → toggle off, or click Remove.
• Safari (iPhone, iPad, Mac): Settings → Safari → Extensions → OddsGuard → toggle off.

For a more lasting break, uninstall the apps and extensions, and please consider a proper self-exclusion scheme so the sportsbooks themselves block your account: GAMSTOP (UK), NCPG (US), or your national equivalent. Our Responsible Gaming page has the full list with phone and chat links.

No — OddsGuard is a price-comparison tool and doesn't take bets or hold funds. Deposit limits, loss limits, and session-time limits are set inside your sportsbook account directly. Every licensed sportsbook we link to supports player-set limits by regulation.

A few things can cause this. Run through them in order:

1. Is the site covered? The overlay only activates on supported sportsbooks. Check the Supported Sportsbooks list.
2. Is the market supported? Some niche markets or sports may not yet be wired up for that specific book.
3. Region restrictions. We only show books legally available in your jurisdiction — that can leave nothing to compare against in some regions.
4. Recent site redesign. When a sportsbook redesigns, our adapter catches up within hours-to-days.

Quick fixes that usually clear it:

• Hard-refresh the page (Ctrl+F5 / Cmd+Shift+R).
• Disable and re-enable the extension.
• Sign out and back in.
• Still stuck? Contact support with the sportsbook URL and your Installation ID.

Pinning the icon takes a couple of seconds. The exact path depends on your browser:

• Firefox: right-click the toolbar → Customise Toolbar → drag the OddsGuard icon into place.
• Safari (Mac): Safari → Settings → Extensions → make sure OddsGuard is enabled.
• Safari (iPhone / iPad): tap the Aa menu in the address bar → Manage Extensions → enable OddsGuard.

If the extension isn’t listed at all, verify it’s installed and enabled at about:addons (Firefox) or the Safari Settings extensions list.

Three places to check, in this order:

1. OddsGuard preferences: open the popup → Settings → Notification Preferences and confirm the category you expect (price alerts vs. special offers) is toggled on.
2. Browser permission: allow notifications from OddsGuard in your browser’s site permissions. On Firefox that’s the small bell or lock icon in the address bar.
3. OS-level Do Not Disturb / Focus: Windows, macOS, and iOS all have a global mute. Make sure you’re not in Focus / Do Not Disturb mode.

OddsGuard uses IP-based geolocation. If you're behind a VPN, corporate proxy, or travelling, detection can be off. You can override the detected region from the extension options page (Settings → Region). If that doesn't resolve it, email support@oddsguard.com with your expected country or state and we'll help correct it.

This usually means privacy consent or age confirmation was declined during first-run. To re-enable, uninstall the extension, then reinstall — the onboarding will show again, and accepting the required notices will activate it. If it still reports disabled, email support@oddsguard.com with your Installation ID.

OddsGuard is idle on non-sportsbook sites and is designed to be lightweight on supported ones. If a page feels slow, work through these in order:

1. Update to the latest version. Most extension performance fixes ride on auto-updates — make sure your browser hasn’t paused them.
2. Disable other sportsbook / odds extensions that might be racing ours on the same page. Two extensions writing to the same DOM is the most common cause of lag.
3. Temporarily disable OddsGuard to confirm it’s actually the cause. If the page is still slow without us running, the issue is elsewhere.

If you’ve confirmed it’s us, please contact support with the sportsbook URL and your browser version — we’ll investigate.

Please tell us so we can patch it fast. Either route works:

• Open the OddsGuard popup → Report an issue.
• Or email support@oddsguard.com.

Include as much of this as you can:

• Sportsbook + sport / event + market
• The price you expected, and the price OddsGuard showed
• A screenshot (huge help)
• Your Installation ID (popup footer)

Use our Contact page or email support@oddsguard.com. The more of this you can include, the faster we can fix it:

• Browser name and version (or the Windows / iOS / Mac app version).
• Operating system.
• Exact steps to reproduce.
• What you expected, and what actually happened.
• A screenshot or short screen recording.
• Your Installation ID (popup footer).