Horrible 3D Blue Flaming Skull Keyboard is a personalization app developed by Fancy Keyboard 2019 for Android users. This app provides a unique keyboard layout with a 3D blue flaming skull design. The skull seems to roar when the user taps on the keyboard keys, which adds an additional layer of interactivity to the keyboard.

The app is free to download and use, providing users with a new way to customize their keyboard. The app is easy to install and set up, and the 3D design is impressive. However, the app lacks some features that other keyboard apps provide, such as predictive text and auto-correction. Also, the roaring sound effect may not be suitable for everyone, and there is no option to turn it off.