Function list
Input: New, Photo Library, Camera
Brushes: 18 types (up to 100 can be customized)
Eraser: 5 types (can be customized up to 100)
Fill: 8 types (with erase mode, customizable up to 100)
Effect pen: 6 types (can be customized up to 100)
Filter: 62 types
Lasso tool: 3 types (+ copy, cut, inversion, reset)
Undo and redo functions
Layer function (up to 10 sheets supported)
Rotate, flip upside down
Paste: Photo library, clipboard
Storage: App-specific data, photo library