No more hassle logging in through a browser. Install the 399days app once, then jump into your favorite game with a single tap anytime. Fast loading, smart notifications, and exclusive app bonuses — all in one place.
Android, iOS, or straight from your browser — choose whatever works best for you
Download the 399days Android APK directly. No Play Store needed — install straight from the file, fast and simple.
IPhone and iPad users can install the 399days iOS app directly, no App Store required.
You can use 399days fully on a mobile browser without downloading the app. Play directly from Chrome or Safari.
Follow the step-by-step instructions — done in just 3 minutes
On your Android phone, go to Settings → Security (or Apps) → Unknown Sources and enable it. Without this, the APK will not install. This setting is only needed for the 399days app — you can turn it off again afterwards.
Click the "Download APK" button on this page. The file will be saved to your phone's Downloads folder. You'll get a notification once the download is complete.
Tap the notification or go to the Downloads folder in your File Manager and open the 399days.apk file. When prompted for installation permission, tap "Install".
Installation completes within 15–30 seconds. You'll see the 399days icon on your home screen. Tap "Open" to log in right away.
If you already have a 399days account, just log in. New users can register directly from the app — and claim an app-exclusive bonus.
Open Safari on your iPhone or iPad and go to 399days.vu. APK files do not work on iOS — use the Add to Home Screen option in Safari instead.
Tap the Share button at the bottom of Safari. It looks like a square with an arrow pointing upward.
Scroll down to find the "Add to Home Screen" option and tap it. Enter "399days" as the name and tap "Add".
You'll now see the 399days icon on your home screen. Tap it and it opens like a full-screen app — no browser address bar in sight.
For the best experience, use Chrome on Android and Safari on iPhone. Type in 399days.vu or bookmark it for easy access.
Tap the "Login" button in the top right corner. Enter your username and password to sign in.
Go to the game lobby and pick your game. The browser version delivers the same quality gaming experience as the app.
App users get extra perks and exclusive offers
Get updates on new bonuses, tournaments, and special offers delivered straight to your phone — never miss a thing.
Once the app is installed, cached game data means games load even faster — smooth performance even on a slow connection.
An exclusive daily bonus is available for app logins only — not available on the browser.
Log in with your fingerprint or Face ID — no need to type your password.
Enjoy the full screen without the browser address bar getting in the way — a truly immersive experience.
Login sessions stay active longer in the app — no need to enter your password repeatedly.
Your phone vibrates when you place a bet or win — making the experience feel more immersive.
Follows your phone's dark mode setting — easy on the eyes for late-night sessions.
The 399days app runs smoothly on everyday smartphones — no high-end device required.
| Topic | Android | IOS |
|---|---|---|
| Operating System | Android 6.0+ | IOS 13.0+ |
| RAM | 2 GB+ | 2 GB+ |
| Storage | 50 MB | 40 MB |
| Internet | 3G/4G/WiFi | 3G/4G/WiFi |
| Screen Resolution | 720p+ | Retina Display |
| Biometric | ✓ Optional | ✓ Face ID |
| App Updates | ✓ Automatic | ✓ Automatic |
Smartphones are everywhere in Bangladesh, but having to open a browser, type in a URL, and log in every time is a hassle most people would rather skip. Downloading the 399days app takes care of all that in one go.
One of the biggest advantages of the app is push notifications. Say you're busy with work and a special tournament kicks off or a limited-time bonus drops — if you don't have the app installed, you might not find out until the evening. With the app, the notification reaches you instantly.
Many people ask whether APK files are safe and whether installing outside of the Google Play Store is okay. That's a fair question. Not all APKs are safe — but the APK downloaded from the official 399days site is completely secure.
Many online gaming apps in Bangladesh are not listed on the Google Play Store, as Play Store has its own policies around gaming apps. That's why the app is distributed directly as an APK — this is standard practice for international gaming platforms.
Every version of the 399days APK goes through antivirus scanning and a security audit before release. Each update is verified to be free of malware and spyware. Always download from the official site at 399days.vu — APKs from third-party sites can be dangerous.
The app will request a few permissions during installation. These may include: Storage access (to save APK updates), Notifications (for bonus updates), and Camera (for document verification, optional). Location and Contacts permissions are not requested.
No need to worry about app updates. Whenever a new version is available, you'll get an update notification right inside the app. Update with one tap — your existing data and settings will not be lost.
Answers to the Most Frequently Asked Questions About Downloading the 399days App
Download for free and claim an exclusive bonus on your first app login.