Azerbaijan Flag 3D Free is a live wallpaper app available on Android 9.0. It is developed by I Like My Country - Flag and falls under the Personalization category. This app lets you display a fluttering flag on your home screen, which changes according to your device's battery level.

One of the unique features of this app is that you can open it by double-tapping on the home screen. Additionally, the full version of the app is ad-free, and it is recommended to buy the full version for a better experience.

However, some users may face issues with the app. For example, the wallpaper may not work properly on some devices at first. Users are advised to set the wallpaper several times and restart their device if needed. Nonetheless, this issue is rare and will not affect most users.