For iOS devices
If you see the Not supported on your device message when trying to download the app, it could mean that your iOS device version is not recent enough (before v14). The TradingView app is only supported on iOS version 14 or later.
For Android devices
If you see the Not supported on your device message when trying to to download the app, it could mean that your Android device version is not recent enough (before v7). TradingView app is only supported on Android version 7 or later.