The official 3999 b mobile app is now available for free. Fast loading, live betting, and instant payouts — all from your smartphone.
Android, iOS, or browser — 3999 b delivers the same great experience everywhere
Download the APK directly and install in just a few seconds. Works seamlessly outside of Google Play.
APK DownloadIOS users can add the site directly to their home screen via Safari. Get the full app experience without needing the App Store.
Add to iOSPlay directly in your browser with no download required. Full experience on any device — PC, tablet, or mobile.
Play in Browser
One app, the full gaming experience. Sports Betting, Live Casino, bingo, VIP perks — everything in one place.
Installing the 3999 b app on any Android or iOS device is straightforward enough that you'll figure it out on your first try. Just follow the steps below.
Go to your phone's Settings > Security and enable "Unknown Sources" or "Install unknown apps".
Click the "Download APK" button on this 3999 b page. The file will be saved to your Downloads folder.
Go to your Downloads folder, find the 3999b.apk file, and tap it.
Tap the "Install" button. Installation takes about 15–30 seconds to complete.
Open the app, log in to your 3999 b account, and start betting.
Open 3999b.pro in Safari → tap the Share button at the bottom → select "Add to Home Screen" → the 3999 b icon will appear on your home screen. You'll get a full app-like experience.
Both options are great — choose the one that fits your needs
| Features | Android App | iOS Web App | Browser |
|---|---|---|---|
| Push Notifications | |||
| Fingerprint Login | |||
| Loading Speed | Ultra Fast | Fast | Standard |
| Live Streaming | |||
| Offline Access | Partial | ||
| Download Required | Yes (48 MB) | No | No |
| BKash / Nagad Payment | |||
| Dark Mode | System Dependent |
Mobile internet has become so deeply embedded in daily life in Bangladesh that people prefer doing almost everything from their phones — shopping, banking, sports updates, all at their fingertips. 3999 b built its mobile app with exactly that in mind, giving users across Bangladesh a reliable betting experience anytime, anywhere.
What makes the 3999 b app stand out is that it was built specifically with Bangladeshi users in mind. Internet speeds in the country can be inconsistent, so the app is optimized to perform well even on low-bandwidth connections. Live betting is possible even on a 3G network — and that makes a real difference.
3999 b is ahead of the game when it comes to payments. The app connects directly with bKash, Nagad, and Rocket — the three most widely used mobile banking services in the country. No need to switch to a browser; deposits and withdrawals are handled entirely within the app. Winnings are typically transferred to your mobile number within 10 minutes.
Security is another common concern. The 3999 b app uses SSL encryption, meaning your transactions and personal data are fully protected. Enabling Two-Factor Authentication makes unauthorized access to your account virtually impossible. Fingerprint login is also supported, so you never have to type your password every time.
The app's interface was designed with everyday users in mind. You don't need to be tech-savvy — the menu is clean, buttons are large and clear, and everything is easy to navigate. New users consistently report feeling comfortable from day one.
Beyond Sports Betting, the 3999 b app also offers Live Casino, bingo, and a wide variety of other games — all accessible from a single account, with no need to switch between separate apps or sites. VIP members get exclusive offers and privileged access through the app that may not always be available on the web version.
The app is updated regularly. Each update brings new features, bug fixes, and performance improvements. Updates typically run in the background, so your betting is never interrupted. The 3999 b technical team works around the clock to keep the app in top shape.
Downloading the 3999 b app is more than just installing software — it takes your betting experience to a whole new level. For regular bettors, the app has become an essential everyday companion.
The official 3999 b APK file is free from viruses and malware. Only download it from this page — never from third-party sites.
If you run into any issues during installation, reach out to our 24/7 live chat support. Help is available in Bengali within minutes.
3999 b believes betting is a form of entertainment and should always be enjoyed responsibly. We strictly enforce an 18+ policy. If you ever feel betting is becoming a problem, please visit our Responsible Gaming visit this page.