Find some more complete and adorable of undertale background image from this app for your mobile phone. These undertale wallpaper provide many character from the undertale game, like Sans, Chara, Frisk, Toriel, Papyrus, Asriel, Gaster, Napstablook, Undyne, Temmie, Flowey, Muffet and Asgore.

Underground Wallpapers has many version of sans such as, Undertale AU, Underverse, Underfresh, Underswap, Underfell, Errortale and much more.

Features:
- Easy and simple application to use it
- Hundreds collection
- Apply and downloadable wallpaper
- High quality design image
- Compatible for all device and android version
- Croping image as wallpaper
- Update for new wallpaper
- Share wallpapers with your friends.

Agree to our privacy policy, because we will use some data from your device and we make sure your data is safe and will not be misused. For our privacy policy you can see it in the application.

This Undertale app complies with the Fan Content Policy. This is an Unofficial Undertale mobile backgrounds and has NO affiliation with the owner. This application is non official which means that this application is not related to any party. The images in this application can be randomly generated, and if you can prove that this application is legally yours, you can contact our team and we will follow up on your complaints.

1. Click the download button to Downloading Page.

2. For Normal APK File, you can direct download the file, or you can choose fast download the file with our Installer.

3. For Speicial file such as XAPK or BAPK, you must to choose fast download the file with our Installer.

4. When you finish the file downloading, you must allow your phone to install the file from unknown resource.