Wallpaper X is a wonderful Wallpaper android application which comes with beautiful design and a separate backend app that will help you to update the app user app by uploading Wallpapers. Overall, you can handle complete app through the backend app such as upload wallpapers as well as delete wallpapers.
Wallpaper X is integrated with firebase backend so their no need for any hosting required. You can track users through real-time firebase analytics. Also, you can send unlimited number of notifications to engage your audience towards the app.
Wallpaper X is fully integrated with admob ads so you can easily generate revenue by reskinning the app and changing AdMob ads id. This app can also detect internet connection and inform the user if the internet not connected.
Wallpaper X fetches all the wallpapers from the firebase realtime database. You can store your data for free.