Pitch Flip
Android coin flip app with a 3D coin rendered in OpenGL ES 2.0, a full skin system, and a hidden Rig Mode that ties the result to your phone's volume level.
About
Pitch Flip is a coin-flip app for Android. The coin is rendered in 3D using OpenGL ES 2.0 with a smooth flip animation, and you can adjust the animation speed with a slider in settings. On the surface it's a simple coin flipper but it's actually a pranking tool.
The app has a hidden Rig Mode that when enabled, the coin result is quietly tied to the phone's volume level: anything above 50% volume lands heads, anything below lands tails. The person being pranked sees a normal coin flip with no indication that anything is rigged. You control the outcome by adjusting your volume before each flip.
Each side of the coin can be customized independently through a skin system. Options include custom text labels, uploaded images, and a set of animal skins: dog, cat, monkey, bear, duck, and chicken, with more planned. All settings and skin choices are stored locally using SharedPreferences so they persist between sessions.