Online manual at:
https://www.aartbik.com/android_manual.php

Checkers for Android consists of an 8x8 checkers engine and a GUI. The application accepts moves through the touch screen or trackball. An optional "move coach" shows all valid user moves and highlights each last played move. Full game navigation enables users to correct mistakes or analyze games. Games import and export as FEN/PDN to and from the clipboard or via sharing or are set up through a position editor. The engine plays at various levels (including random and free-play). By popular request an option was added to select between mandatory captures (the official rule) or optional captures (a common home rule but without "huffing" where the piece that should have performed the capture is forfeited; instead the game simply continues). The user can play either side and independently view the board from the perspective of white or black.