Straight answer
The Casumo app is available for iOS from the App Store and for Android, and it is small. Around 50MB. It carries the same lobby, the same promotions and the same cashier as the desktop site.
You do not need it. The mobile site runs the full game library in a browser with no install, and for occasional play that is the better option. The app earns its place if you play regularly and want biometric login and promotion notifications.
Getting it, on each platform
iPhone and iPad
The app is distributed through the App Store in the British storefront. Search for the brand name, check that the publisher is Casumo, and install as normal. Apple reviews gambling apps and restricts them by region, so an app that does not appear for you usually means your Apple account is set to a different country's store rather than that it does not exist.
Android
Android gambling apps in Britain are sometimes distributed through Google Play and sometimes as a direct download from our own site, depending on current store policy. If you are installing outside Play, get the file from our site and nowhere else, gambling apps are a favoured target for repackaged malware, and a version obtained from a third-party mirror is not the app.
Signing in uses the same credentials as the website. There is no separate app account, and balances, bonuses and verification status are shared. Verify once and it applies everywhere.
App versus browser, honestly compared
| Feature | App | Mobile browser |
|---|---|---|
| Game library | Full | Full |
| Install required | Yes, about 50MB | No |
| Biometric login | Yes | Via password manager only |
| Promotion notifications | Push | Email only |
| Launch speed | Faster after first load | Depends on connection |
| Cashier and verification | Same | Same |
| Leaves a trace on the device | Yes, an icon | Only browser history |
| Updates | Periodic downloads | Automatic |
The row worth pausing on is the last-but-one. An app icon on a home screen is a permanent prompt to open it, and push notifications are designed to bring you back. If you are the kind of player who benefits from a small amount of friction between the impulse and the lobby, the browser version is not a compromise. It is the better product for you.
Conversely, if you play often and deliberately, the app is genuinely more pleasant: faster to open, biometric sign-in, and tournament alerts that actually arrive in time to participate.
Performance, data and battery
Modern slots are graphically heavier than they look. A twenty-minute session streams a surprising amount of asset data on first load of each new game, though far less on repeat visits once assets are cached.
- Data. Expect the heaviest usage in the first few minutes of a new title. Live dealer tables are the exception, they stream continuously video and use considerably more than slots throughout.
- Battery. Live tables and animation-heavy slots are the drain. Reducing screen brightness helps more than closing background apps.
- Storage. The app itself is modest, but cached game assets grow over time. Clearing the cache occasionally recovers space without affecting your account.
- Connection drops. Slot outcomes are determined server-side, so a lost connection mid-spin does not lose the result. Reopening the game restores it. Live tables are less forgiving: a dropped connection during a hand can forfeit the bet under table rules.
What the app is actually for
Beyond convenience, three things work better in the app than they do anywhere else, and all three relate to the reward layer rather than the games.
Reel Race alerts
Tournaments run to a schedule and last around twenty minutes. Without a notification you find out about them by chance. With one, you can decide whether to join. Detail on the Reel Races page.
The daily wheel reminder
The login spin resets daily and is easy to forget. A push notification turns an occasional freebie into a consistent one, which over a month is the difference between the reward existing and mattering. See the free spins page.
Quest progress
Campaign missions have deadlines and partial progress that expires. Seeing where you are without opening the site is the difference between finishing a mission and abandoning it two steps short.
None of this changes the games or the odds. It changes how much of the promotional value you actually collect, which for a regular player is not a trivial amount.
Same account either way
Balance, bonuses and verification carry across app and browser. Sign in once, wherever you prefer.
Safer gambling on a device you carry
A phone changes the shape of gambling more than any other factor: it removes every natural stopping point. Four settings are worth applying on the day you install the app rather than later.
Turn off promotional push notifications if you have any doubt about them, while keeping transactional ones. Notifications are engineered to prompt a session, and there is no obligation to accept that prompt into your pocket.
Set a deposit limit before the first deposit. Tightening one applies immediately; loosening it goes through a cooling-off delay. Setting it early costs nothing and removes a decision from every future session.
Enable session reminders. A periodic prompt with elapsed time and net position is unremarkable in a ten-minute session and sobering in a two-hour one, which is exactly when it is useful.
Do not save the password for one-tap access if speed of entry is a problem for you. Biometric login is convenient; convenience is not always what you want here.
The complete toolkit, including cooling-off, account closure and GAMSTOP, is on the safer gambling page. All of it works identically in the app and the browser.
When the app misbehaves
App problems are boringly predictable and almost all of them are resolved without contacting anybody.
| Symptom | Usual cause | Fix |
|---|---|---|
| Games will not launch | Corrupted cached assets | Clear the app cache, reopen |
| Stuck on a loading screen | Outdated build | Update from the store |
| Signed out repeatedly | Aggressive battery optimisation | Exclude the app from background restrictions |
| Biometric login stops working | Changed device passcode or fingerprint | Sign in with the password once to re-enrol |
| Live tables stutter | Bandwidth | Switch to a stronger connection before playing |
| Deposits fail in-app only | Payment sheet blocked | Retry in the browser version |
If a problem survives a cache clear, an update and a reinstall, it is worth reporting rather than repeating. Note your device model and operating system version before opening live chat, it is the first thing you will be asked, and having it ready halves the conversation.
Questions UK players actually ask
Is there a Casumo app for iPhone?
Yes, distributed through the App Store in the British storefront. If it does not appear in search, your Apple account is probably set to another country's store.
How do I download the Casumo Android app?
Either from Google Play where policy allows it, or as a direct download from the our own site. Never install a gambling app from a third-party mirror or a link in a message.
How big is the Casumo app?
Around 50MB, which is small for a casino app. Cached game assets add to that over time and can be cleared without affecting your account.
Do I need the app to play on mobile?
No. The mobile site runs the full game library in a browser with no install. For occasional play that is the simpler option.
Are all games available in the app?
Yes. The lobby, promotions and cashier are the same across app and browser, and your balance and verification status are shared.
What happens if my connection drops mid-spin?
Slot outcomes are decided server-side, so reopening the game restores the result. Live dealer tables are different, a disconnection during a hand is resolved by the table rules.
Can I set deposit limits in the app?
Yes, and they apply across every device. Tightening a limit takes effect immediately; loosening one goes through a cooling-off delay.