Logging In via the Mobile App
The CK444 Android APK (approximately 25 MB) and the iOS PWA offer the same login interface as the browser version. The difference is convenience: the app can store your session persistently, meaning you stay signed in between sessions unless you manually log out or clear app data.
On Android, after installing the APK from the official CK444 download page, open the app and tap the Login button on the welcome screen. Enter your phone number and password. Some devices support fingerprint or Face ID login if this is enabled in your account settings.
On iOS, add the CK444 site to your home screen via Safari (PWA method). The shortcut opens the site in a full-screen session. The login process is identical to the browser version, but the experience feels more like a native app.
If your session expires, the app returns you to the login screen automatically. This happens after extended inactivity or if you explicitly log out from the profile menu.