Sports betting moved to the phone because the action did: live betting is most of the volume, and live betting happens wherever the game finds you. Six of the books we test ship genuine mobile builds. What separates them is not the icon — it is what happens in the three seconds after you tap a price.
What a betting app has to do fast
The bet slip is the product
Price taps, stake entry, confirmation: every step of latency on a moving line costs real money, because live odds shift while slips sit open. The good clients here confirm in under a second and reprice transparently when the line moves; the weak ones make you re-tap into worse numbers. Player reports on slip behaviour weigh heavily in these rankings.
Streams and state
Live betting beside a stream is the modern product, and mobile clients differ on stream stability across network handoffs — wifi to cellular mid-session is where weak builds drop. Same for state: an app that loses your slip on a backgrounded session is an app that costs you bets.
Native vs PWA, sportsbook edition
App-store gambling rules keep most offshore books out of the stores, so PWAs dominate here as in casinos. The calculus differs slightly: push notifications for settled bets and line alerts are genuinely useful in betting, which makes the rare native apps worth noting — the reviews flag who ships one. A first-class PWA still covers the core: full markets, live betting, cashier.