Underground Wallpapers - The Ultimate Undertale Background App

Explore a vast collection of adorable and complete Undertale background images featuring characters like Sans, Frisk, Chara, Toriel, and more. Whether you love Undertale AU, Underverse, Underfresh, or Underswap, this app has it all!

Features:

1. Easy to use application with hundreds of wallpapers to choose from.

2. High quality design images compatible with all devices and Android versions.

3. Crop images to use as wallpapers and share with friends.

4. Regular updates with new wallpapers added frequently.

Privacy Policy:

Rest assured, we prioritize your privacy and ensure that your data is safe and secure. Our app complies with the Fan Content Policy and is not affiliated with the official owner of Undertale.

User Feedback:

As a user of this app, I must say that I am highly impressed with the variety and quality of wallpapers available. It's convenient to use, regularly updated, and a must-have for any Undertale fan. Highly recommended!

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.