So how do people play it on a phone?
Sweet Rush Bonanza is built in HTML5, which means it runs inside any modern mobile browser without a plugin, a download or an install. Open your casino in Safari or Chrome, find the game, and it plays. That is the whole setup.
On top of that, most UK operators do publish their own apps — a casino app, not a game app. Install one of those and Sweet Rush Bonanza sits in its lobby alongside the rest of the Pragmatic Play catalogue. You get push notifications, biometric login and a faster cashier, but the game inside is byte-for-byte the same build as the browser version.
The part that matters
Browser, casino app or home-screen shortcut — the RTP does not change. All three load the identical 96.50% build, run the same RNG on the same servers, and offer the same 5,000x ceiling. Nobody gets a better version of the game by installing something.