AI code is a programmable calculator for Android.
It is also available within the StockRoom App to support financial calculations.

AI code supports Forth-style definitions, variables and lamda expressions. As an engineer, I have been using a HP calculator since University and this is how I imagine a modern programmable calculator. The app comes preloaded with lots of example code to try out.
Use :clearcode to remove all examples, and :defaultcode to restore all examples.
Observe the secret message to find out what AI stands for and enjoy the psychedelic dots while staring at the keys.