Mobile Application
Your full casino and betting world, right in your pocket. With the ok big app, bet on live matches from anywhere, make instant payments, and enjoy the whole experience in Bangla.
Install the ok big app the right way for your device
To install the APK, enable "Unknown sources" or "Install unknown apps" in your phone's settings.
Tap the button below to download the APK file
Open the downloaded APK from your file manager
Tap Install and open the app once it's done.
Log in to your existing account or register a new one
To download on iOS, use our direct link or TestFlight. An App Store version is coming soon.
Open the ok big iOS link in Safari
Tap "Add to Home Screen" or the "Install" button
Go to Settings → General → VPN & Device Management to trust the app
Tap the ok big app icon on your home screen to get started
You don't need to download the app to use ok big. Visit the site in Chrome or Safari and tap "Add to Home Screen" for an app-like experience.
Everything the website offers — faster and easier
Bet at real-time odds while the match is in progress. Odds update faster in the app than anywhere else.
Match kick-off, odds changes, withdrawal confirmed — get every update instantly.
Log in instantly with your fingerprint or Face ID — no password needed.
You can still view past match history and your balance even without an internet connection.
The entire ok big app interface is in Bangla. No language barriers.
Save your Mobile Pay or Nagad number once, and every future deposit is just one tap away.
Dark theme for easy viewing — enabled by default.
Follow live scores for your active bets right inside the app — no need to open another site.
A quick look at every section of the ok big app
| Subject | Android | IOS |
|---|---|---|
| Minimum OS | Android 5.0+ | IOS 13.0+ |
| RAM | 2 GB+ | 2 GB+ |
| Storage | 50 MB+ | 60 MB+ |
| Internet | 3G/4G/WiFi | 3G/4G/WiFi |
| File Size | 32 MB | 38 MB |
| Biometric | Fingerprint | Face ID / Touch ID |
| Language | Bengali, English | Bengali, English |
Mobile internet usage in Bangladesh keeps growing, and most people now spend far more time on their phones than on a computer. ok big built its mobile app with exactly this in mind — bringing everything the platform offers into a clean, well-organised experience on a small screen.
Most betting sites' mobile versions are just shrunken desktops — tiny buttons, oversized tables, and sluggish loading. The ok big app was built from the ground up for mobile. Everything from live cricket scorecards to the betslip is laid out for effortless one-handed use.
Many people feel hesitant about installing an APK outside of the Google Play Store — that's completely understandable. However, ok big's APK is downloaded directly from their official servers, so there's no security risk. Every update goes through a fresh verification of the file.
Before installing, go to your phone's settings and enable "Unknown sources" or "Install from unknown apps". This only needs to be on during installation — you can turn it off afterwards. Once the ok big app is installed, it runs like any other app on your phone.
The ok big app has a smart push notification system. You'll get updates on scores for matches you've bet on, withdrawal confirmations, and new promotions — all in real time. You can also choose to turn off specific types of notifications whenever you like.
Ok big app notifications are especially handy on big match days. Getting odds-change alerts before a match starts gives you the best chance to place your bet at the right moment.
Ok big releases at least one app update every month, bringing new features along with performance improvements. There's an "Check for Updates" option right inside the app, so you can download the latest version anytime.
What ok big app users are saying
"Deposited via Mobile Pay and got my balance within just 1 minute. The app runs so smoothly — it doesn't even feel like a Bangladeshi betting app."
"Placing bets during a live cricket match is so easy on this app. The odds update so fast — you just can't get that on a browser."
"The fingerprint login is a game-changer. Typing my password every time was such a hassle — now I'm in with a single touch."
"Everything on ok big is in Bangla — that's the biggest thing for me. You can use it easily even if you don't know English."
Straight answers to common questions about using the app