The smartphone in your pocket is now your casino. From cricket betting to Live Casino — everything is in one place on the b399 app. Fast loading, low data usage, and hassle-free payments.
B399 app runs at full speed on both Android and iOS
Most smartphone users in Bangladesh are on Android. The b399 Android app is optimized to run smoothly even on low-RAM devices.
Using an iPhone or iPad? The b399 iOS app takes full advantage of Apple's high-performance hardware to deliver the ultimate gaming experience. Games look stunning on a Retina display.
Not Just an App — a Complete Gaming Platform
The b399 app is built with Bangladesh's mobile networks in mind. Even on a 3G connection, the app loads in under 3 seconds — no lag, no freezing while you play.
Before a match kicks off, when a big offer drops, or when your bet wins — the b399 app notifies you instantly. Never miss a thing.
Log in in just one second using your fingerprint or Face ID. No need to type a password — and security stays at the highest level.
Cricket, football, tennis — bet live while watching the match. The b399 app has built-in live streaming, so no separate app required.
BKash, Nagad, or Rocket — deposit and withdraw directly within the app. No need to go elsewhere, no copy-paste hassle.
Enable dark mode for a comfortable viewing experience while playing at night or in low light. The b399 app automatically follows your phone's theme.
A b399 user in Sylhet playing the lottery on the app
Get the b399 app up and running on your phone in just 5 steps
Go to b399.bet and click the "App" menu at the top. You'll find the Android APK download button there.
On your phone, go to Settings → Security → Unknown Sources and enable it. Without this, APK files cannot be installed.
Tap the download button. The file will be saved to your phone's Downloads folder. At just 15 MB, it downloads in no time.
Tap the b399.apk file in your Downloads folder. Hit Install and wait a few seconds.
Once installed, open the app. If you already have an account, log in — or sign up for a new one in just 1 minute.
Open b399.bet in Safari on your iPhone. Safari works best for installing PWAs compared to other browsers.
Tap the iOS download button on the app page. You'll be taken directly to b399's dedicated App Store page.
Open the b399 app page on the App Store and tap "Get". Confirm with Face ID or Touch ID if prompted.
Download and installation complete within 1 minute, depending on your internet speed. The b399 icon will appear on your home screen.
Tap the b399 app on your home screen and log in to your account. Allow notification permissions so you never miss an offer.
A user playing mobile casino on the b399 app in Mymensingh
Life in Bangladesh without a smartphone is hard to imagine these days. We check our phones first thing in the morning and last thing at night — and that's exactly what b399 was built around. The core idea behind the b399 app was simple: run effortlessly on the everyday phones of everyday people in Bangladesh.
Whether you're a farmer in Rangpur, a businessman in Chattogram, or a young professional in Dhaka — the b399 app was built with everyone in mind. The interface is fully in Bangla, buttons are large and clear, and it runs smoothly on any standard Android phone.
The best part about the b399 app is that once you're logged in, you never need to open a browser again. Deposit, play, withdraw — all from one place. Whether you're stuck in Dhaka traffic or relaxing on your balcony on a day off, b399 is always with you.
Both options have their advantages — compare them and decide
| Features | b399 App | Mobile Web |
|---|---|---|
| Loading speed | Much faster | Relatively slower |
| Push Notifications | Yes | No |
| Biometric Login | Yes | No |
| Data Efficient | More Affordable | Higher Cost |
| Offline Caching | Partially Possible | No |
| Live streaming quality | Maximum | Medium |
| Installation Required | Yes (Once) | No |
| On Any Device | Android/iOS | All devices |
| One-Tap Payment | Yes | Partial |
| Home Screen Shortcut | Automatic | Manually |
* Mobile web is fully functional — the app just offers a few extra benefits.
A user making a deposit via the b399 app in Dhaka
Security is always the first concern when handling money online — and rightly so. b399 takes this seriously. Every connection in the app is protected by 256-bit SSL encryption, which means your password, balance, and transaction details are completely invisible to any third party.
The b399 app supports Two-Factor Authentication (2FA). Every login is verified with an OTP, and if any suspicious activity is detected, your account is automatically locked temporarily. No one can access your account without your permission.
B399 is an internationally licensed operator. Game outcomes are verified for fairness through regular third-party audits. You can view the full history of every bet right in the app — no hidden information, no fine print.
All data is secured with bank-grade encryption
Mobile OTP required for every withdrawal
Approved by International Regulatory Authorities
Your personal information is never shared with third parties
Real experiences from players across Bangladesh
"I used to play on other sites, but ever since I downloaded the b399 app, I haven't gone anywhere else. Depositing with bKash is so easy now — the whole thing takes about 5 minutes."
"The b399 app runs perfectly even on my old Walton phone — no lag at all. Watching live cricket while placing bets is honestly the best part."
"Won some money after a match at 11 PM, requested a withdrawal right away — it hit my Nagad in just 2 minutes! I never thought something like this was possible before the b399 app."
"The fingerprint login feature is brilliant — no more remembering passwords. The b399 app gets regular updates with new features, so it never gets boring."
"Even with weak network in rural areas, the b399 app runs fine. All my friends use b399 now. Winning consistently every month — couldn't be happier."
"I use an iPhone and the iOS app is super smooth. The graphics look great and the touch response is spot on. b399 has built a genuinely professional app."
Everything You Want to Know About the b399 App