Supported Platforms
399db App — A Seamless Gaming Experience on Both Android and iOS
About the 399db App
Smartphones are an inseparable part of daily life. From the morning commute to office breaks to winding down at night — your phone is always within reach. That's exactly what inspired the 399db mobile app. The goal is simple: wherever you are, the best gaming experience is always with you.
Most online gaming apps fall short of the full desktop experience — but not 399db. The app lets you play Live Casino games, slots, and Sports Betting, and handle deposits and withdrawals, all with just a tap on your phone. Everything you get on desktop is right here in the app.
What Makes the 399db App Different?
There are plenty of online gaming apps out there, but the 399db app stands out for a few good reasons. First, the entire interface is in Bangla, so users in Bangladesh can navigate everything easily without wrestling with English menus. Second, the app is only 18 MB, meaning it installs without a hitch even on older phones or devices with limited storage.
Third, the adaptive streaming technology in the 399db app automatically adjusts video quality based on your mobile data speed, so Live Dealer games run with minimal interruption even on a slow connection. Fourth, push notifications deliver new bonuses, free spins, and special offers straight to your phone — no need to check manually.
Live Casino, Slots, and Sports Betting — All in One Place on the 399db Mobile App
How to Download
Install the 399db app in just a few steps and start playing right away.
For Android
Register
Start by creating an account on 399db. Registration takes just one minute — simply enter your name, mobile number, and password.
Enable Unknown Sources
Go to Settings > Security > Unknown Sources on your phone and enable the option. Without this, the APK won't install.
Download APK
Download the Android APK file from the official 399db site. The file is only 18 MB, so it downloads quickly.
Install & Log In
Once the download is complete, tap the APK file to install it. Then log in with your account and start playing.
For iOS
Open Safari
Open the official 399db site in Safari on your iPhone or iPad. Other browsers may not work.
Go to iOS App Link
Tap the iOS download button in the app section and follow the installation prompts.
Trust
Go to Settings > General > VPN & Device Management and trust the 399db certificate.
Open the App
Tap the 399db icon on your home screen, log in, and start enjoying all the games.
Always download the APK from the official 399db website. Downloading from third-party sites or unknown links can put your security at risk.
Fast Deposits & Withdrawals on the 399db App via bKash, Nagad, and Rocket
Key App Features
Fast Loading
The app is optimized to load pages 60% faster than a browser.
Push Notifications
New bonuses, cashback, and special offers are delivered directly to your phone.
Biometric Login
Log in securely in seconds using your fingerprint or Face ID.
Low-Data Mode
Enable data-saving mode to enjoy live games while using less mobile data.
One-Tap Payments
With bKash, Nagad, or Rocket saved, deposit or withdraw in a single tap.
Dark Mode
Dark mode is enabled by default for comfortable viewing at night.
All Games in One Place
Live Casino, Slots, and Sports Betting — all in one app.
Bangla Interface
Fully Bangla menus and instructions — no language barrier.
Auto Update
The app updates automatically when a new version is available — no manual action needed.
System Requirements
| Features | Android | IOS |
|---|---|---|
| Minimum OS | Android 6.0+ | IOS 13.0+ |
| File Size | 18 MB | 22 MB |
| RAM | 2 GB+ | 2 GB+ |
| Internet | 3G / 4G / Wi-Fi | 3G / 4G / Wi-Fi |
| Biometric Login | Supported | Supported |
| Push Notifications | Supported | Supported |
| Dark Mode | Supported | Supported |
| Low-Data Mode | Supported | Coming Soon |
399db App — Push Notifications, Biometric Login, and All the Modern Features You Need
Register on 399db for the first time through the app and receive a special welcome bonus. Your first deposit via the app also comes with additional benefits. See the Promotions page for full terms and conditions.
What You Need to Know About Using the App
Can I deposit and withdraw directly in the app?
Yes, the 399db app includes a full payment system. bKash, Nagad, Rocket, and bank transfers can all be done directly from the app. Once you save a payment method, future transactions take just a single tap. The same applies to withdrawals — requests made through the app are typically processed within 15 minutes to 24 hours.
How do I get app updates?
399db supports auto-update. With Auto Update enabled in the app settings, the app will update automatically whenever a new version is available. To update manually, go to the About section of the app and tap Check for Updates. Every update brings new games, bug fixes, and performance improvements.
Can the same account be used on multiple devices?
Yes, you can log into your 399db account on any device — Android phone, iPhone, or tablet. If multiple devices are active on the same account simultaneously, the older session will be automatically closed for security reasons. Game history, balance, and bonuses stay synced across all devices.
For the best streaming experience during Live Casino games, use Wi-Fi. If you're on mobile data, turn on the 399db app's low-data mode — video quality will drop slightly, but gameplay will stay smooth.