Understanding sports betting odds and calculating value bets

Free Bets valid on any sports market excl. Virtuals, expire in 7 days, non-withdrawable and must be used in full (£10 each).

What is Odds Comparison?

Bet too little and you leave growth on the table. Most odds platforms include a Kelly calculator now. What matters more than the tool is actually using it. A surprisingly large number of bettors who understand the concept still size bets by feel. That’s how bankrolls quietly disappear during stretches that were entirely within normal variance.

Browse available markets and events

The full stack doesn’t have to be expensive. A free OddsJam or BetBurger trial for line shopping, Action Network’s free tier for tracking, and Outlier if props are your focus. The math takes care of the rest, as long as you’re running it. Place a £10+ bet at min odds 1/1 (2.0) within 14 days of sign-up. Get £30 in Free Bets, valid for 7 days on selected bets only. Deposits via PayPal, Neosurf, Paysafe, Apple Pay, NETELLER, Skrill, ecoPayz, Kalibra/Postpay and WH PLUS Card excluded. Bet a min £/€10 at odds of 1/1 (2.0) or greater across sports or racing within 7 days of registration to qualify. Receive £/€20 Tote Credit, £/€10 Free Sports Bet within 48 hours of qualifying bet settlement. Qualifying bet is the first racing pool or sports bet added to bet slip. Voided/non-runner bets will not qualify; subsequent bet will be qualifying bet. Opt in, bet £10 or more on any football market at minimum 1/1 odds within 7 days of registration. Get £30 in Free Football Bets, selected markets. Virtuals) at 1.5 min odds, settled within 14 days. Free Bets: accepted in 7 days, valid 7 days; £20 use on sportsbook, £10 on Bet Builder. Min first £5 bet within 14 days of account reg at min odds 1/2 to get 6 x £5 free bets (selected sportsbook markets only, valid 7 days, stakes not returned). Place a £10 fixed odds Outright bet on a nation to win the World Cup. Once placed, receive 1x free £10 fixed odds bet, 2x free £10 football spread bets. Receive a further free £10 fixed odds bet for every match your chosen nation wins during the World Cup, to a max of 7. Available to verified customers residing in the UK. Place your first bet of £10 at minimum odds of 1/1 on any sports market within 7 days of registering.

• Country-specific geo-filtering to show only legally available bookmakers
• Quick deposit method comparison (fees, speed, limits) per sportsbook
• Player prop builder for custom fantasy points and stat lines
• Responsive customer service for reporting incorrect or stale odds
• Partnership badges for official league data providers
• Internal forum for user discussion on strategies and bookmaker experiences

Get £30 in Free Bets (1 x £10 Horse Racing Free Bet + 1 x £10 Football Acca Free Bet + 1 x £10 Basketball/Tennis Acca Free Bet )T&Cs apply. Applies to the 1st deposit using code WELCOME7. Min qualifying bet £20 at odds 1/1 (2.0). Bonus Bets issued as 1×£7 BB (any sport excl.

App Name	Avg. Monthly Users (Est.)	App Store Rating (iOS)	Play Store Rating (Android)	Key Differentiator
Oddschecker	2.1M	4.7	4.5	Brand legacy, comprehensive coverage
Betfair Exchange App	1.8M	4.8	4.6	Integrated with exchange betting
Flashscore Betting	1.5M	4.6	4.4	Seamless link with live scores
SmartBets	950K	4.4	4.3	Focus on value bet alerts

Virtuals), followed by 1×£7 BB (Horse Racing, SP/EW excluded) and 1×£7 BB (Football ACCA, min 4 selections, min odds 4.0). New customers: Deposit £10+ within 7 days and place a sports bet.

The Week's Best Betting App for Sport - bet365

Register, deposit with Debit Card, and place first bet £10+ at Evens (2.0)+ on Sports within 7 days to get 3 x £10 in Sports Free Bets & 2 x £10 in Acca Free Bets within 10 hours of settlement. Place a bet of £5 at min odds of 2/1 (3.0) and get £30 in Free Bets within 48 hours. Opt in, deposit and bet £10 on any football (odds 1/1+) within 3 days of sign up. Get 3x£10 Free Bets for set football markets. New customers: Deposit £10+ within 7 days and place a sports bet (place element of E/W bets excluded). Get 4 x £10 Free Bets (2 x £10 Bet Builders & 2 x £10 Sports Bet). Excludes virtual sports, esports and non-UK/IE horse racing.

We Don't Sell Tips. We Show You the Maths.

That’s where dedicated prop tools pull their weight. Outlier focuses specifically on player prop research. It lets you filter by sport, market, and stat, then compare pricing across books for discrepancies. Its arbitrage feed and EV alerts work well for bettors who live in the props market, and the interface is genuinely one of the cleaner ones in this space. Side-by-side prop pricing across multiple books, updated in real time, so you can spot when one book is clearly off the market on a player total or matchup line.

7. Paddy Power - Best App For Bet Builders

EV alerts that surface positive expected value opportunities automatically, without you having to manually scan every market every hour. College basketball head-to-head matchup data, which makes it more versatile than it looks at first glance. The Kelly Criterion is the mathematical framework most professional bettors use for sizing bets. It tells you what percentage of your bankroll to wager based on your estimated edge and the odds. Bet too much and a normal losing run wipes you out. To qualify for free bets, the new user must place and settle £20 on easyBet markets. The user must bet best betting apps uk free bet on at least 2 different events to qualify. The user must place and settle bets at odds of 2.0 or more. An event is classed as two different sporting events. Bets can be placed on singles, multiples and Bet Builders. The user must place and settle bets before the closing date of the promotion to qualify. Users making their first deposit by Skrill, Neteller or PaySafe card will not qualify for this promotion.

Best Mobile Betting Apps Up Close

Free bet stakes not included in returns. Eligibility restrictions and further T&Cs apply. Free Bets are paid as Bet Credits and are available for use upon settlement of bets to value of qualifying deposit. Free bet applied on 1st settlement of any qualifying bet. Cashed out/Free Bets won’t apply.

What are the top sports to bet on mobile?

1 Free Bet offer per customer, household & IP Address only. Available on one bet per selected event. Boost will be added once all selections have settled. Offer does not apply to multiple bets. Free/void/cashed out bets won’t qualify. £40 worth of Free Bet Tokens awarded on bet settlement plus additional £20 Free Bet tokens will be credited on the 11th June. 6 x £10 each with betting restrictions. Each Profit Boost is available for bets with no odds restriction.

• Multi-language support for key betting markets globally
• Responsive web version and native iOS/Android applications
• Offline access to previously loaded odds and saved comparisons
• Secure login via biometrics or two-factor authentication
• Ad-free premium subscription tier

The maximum stake for a Profit Boost is £30. Each Profit Boost lasts for 24 hours. The Profit Boost cannot be used with Free bets. The Profit Boost applies only to single bets. Bet and Settle 1x£10 Bet on Matchbook Exchange at odds of 2.0 or more.

How We Ranked Best Betting Sites with Highest Odds

Only deposits via Pay by Bank, Apple Pay or Debit Card will qualify. Min first £5 bet within 14 days of account registration at min odds 1/2 to get 6 x £5 free bets (selected sportsbook markets only, valid 7 days, stake not returned). New UK customers only, registering with promo code R30. Make your first deposit of £10+, then place a £10 single bet from main balance at odds of 1/2+ on any sports market (excluding Virtuals). Get £30 in Free Bets (3x£10) after settlement. Bet and Settle 1x£10 Bet on a Bet Builder or Multiple at odds of 3.0 or more, with min 3 selections. Within 72 hours of Qualifying Bets settling user will receive 1x £10 Exchange Free Bet, 1x £10 Multiples Free Bet, and 1x £10 Bet Builder Free Bet. Bet £10+ on any sportsbook markets at odds of evens (2.00) or greater.

• Comprehensive coverage of esports, tennis, soccer, basketball, and MMA
• In-play/live betting odds comparison with a dedicated fast-refresh mode
• User-generated notes and tags for specific bookmakers or events
• Provably fair odds checker to identify potential errors or soft lines

Get 50% back of your first day’s losses (from first bet settlement until 23:59) as a Free Bet up to £25, valid for 7 days.

• Aggregated "best odds" guarantee tables for top 5 bookmakers per market
• Weather condition indicators for outdoor sports when it affects betting lines
• Historical performance data showing which bookmaker offers the best price most often
• Social sharing feature for "best find" odds comparisons

3 bets on different events required, with 2 bets being at least 50% of your largest stake.

App Name	Integrated Bookmakers	Primary Markets	Live Update Speed
Oddschecker	Bet365, Ladbrokes, William Hill, Paddy Power	Football, Horse Racing, Tennis	Real-time
Betfair Exchange	Betfair, Sportsbook partners	All major sports, Politics	< 10 seconds
Flashscore Betting	20+ European bookies	Football, Basketball, Ice Hockey	Near real-time

Place at least 1 bet of £10+ at odds 2.00+ to receive a £5 Free Bet even if your account is up or losses are under £5. Place a £10 real money bet at min.

iOS and Android Ratings for the UK’s Best Betting Apps

Get 4 x £10 Free Bets (each requires 2+ selections). Excludes eSports and non-UK/IE horse racing. £20) via mobile or app on any football (odds 1/1+) within 7 days of registration. Get up to £40 in free bets on selected markets, which expire in 7 days. Place a min £10 bet on Sportsbook on odds of min EVS (2.0), get 5x £10 in Free Bet Builders, Accumulators or multiples to use on any sport. 2.0 odds within 5 days of deposit. Get 4 x £10 Free Bets: 1 Single, 2 Accas & 1 Bet Builder (min. Excludes cashout, E/W, Multis, Ineligible Markets & Odds Boosts. odds 1/1 (2.00) to get 4 x £5 Free Bets: 1 x £5 Football Bet Builder, 1 x £5 Football Acca, 1x £5 Horse Racing Acca & 1 x £5 Tennis In-Play. If your first bet is a Treble or Up on Any Sport (minimum 3 selections) AK Bets will boost the profit gained on that initial bet by 25% in the form of a Free Bet up to a value of £100. Applies to new customers who sign up to AK BETS with the promo code AKACCA100. Free Bet will be credited within 24 hours of settlement of Qualifying Bet and will expire after 7 days. 18+ New UK players only Min deposit req. £10 Certain deposit methods excluded Place 1 sport bet (3+ selections) Excl Horse Racing Min stake £10 Max stake £20 Min Odds 2/1 (3.0) Max FreeBet £20 for football only FreeBet valid for 7 days FreeBet stake not returned T&Cs apply Min £10 qualifying bets stake not returned. Free bet - one-time stake of £30, min odds 1.5, stake not returned. Withdrawal requests void all active/pending bonuses. Min Deposit £10 with promo code: ROYAL required. Minimum of £10 worth of qualifying bets to any horse racing event to get a £30 Free bet. Free bet must be used within 7 Days and bonus within 7 Days from receipt. Free bet is a one-time stake, minimum odds of 2, stake is not returned. Place a minimum £40 bet on any selection with minimum odds of Evens (2.00) and receive 4x£5 Free Bets. Applies to new UK/IE customers who sign up via approved partner sites with promo code bet20get10. Place a minimum £20 cash bet at odds of Evens (2.0) or greater and receive a £10 Free Bet 18+. Free bet - one-time stake of £50, min odds 1.5, stake not returned.

Please gamble responsibly

Deposit and Bet £10+ on sports at min odds of 2.0+ (1/1) for £30 in Free Bets within 7 days. Debit cards or instant bank transfers only. Free bets expire within 7 days of issue. Geographical restrictions and T&C’s apply. Bet £10+ to receive £10 in Free Bets.

Dubai World Cup

Any new account registration or bets settled on 11 April 2026 between 00:00 and bet football betting app free 17:00 are not eligible for this Welcome Offer. Virtuals) 1.5 min odds, settled within 14 days. Free Bets: accept in 7 days, valid 7 days: £30 use on sportsbook. Place a min £10 bet on Football on odds of min 1.5 (1/2), get £50 in Free Bet Builders after the qualifying bet has been settled. Only deposits via Pay by Bank, cards & Apple Pay will qualify. Limited to 1 sport & 5 casino brand/s within the network. Free bet - one-time stake of £40, min odds 1.5, stake not returned. Bets placed on sports at odds of 2.00 or more to qualify.