A free app for Android, by ZeoWorks.

Slendytubbies: Android Edition is a new version of the original Slendytubbies horror game, released in 2012. The game starts when Slendytubbies enters a strange house, where she is attacked by an unknown entity. It is then that the player begins to experience the most terrifying moments of the game, where it is impossible to escape, and the entity keeps on killing the player one by one. The only way to survive is to find the key to escape the house. And the only way to do that is to solve the puzzle that is in front of you.