OSTTALE is a free Android app created by SnightCoder under the Multimedia category's Music & Radio subcategory. This app is designed for Undertale fans who want to listen to calming and relaxing music from the game. The app features all the songs made by Toby Fox, the creator of Undertale.

The app is a perfect choice for fans who want to immerse themselves in the world of Undertale and enjoy the game's beautiful soundtrack. It is recommended to use headphones for the best experience. The app has a simple and user-friendly interface, and it is easy to navigate. Overall, OSTTALE is an excellent app for Undertale fans who want to enjoy the game's soundtrack on their Android devices.