A free program for Android, by Simon Steinmann.

Jass is a strategy board game for 2 or 4 players. A game of Jass consists of one or several rounds, during which each player has to place all of their pieces on an 8×8 grid according to the rules. After all players have placed their pieces, the grid is checked to see if the game is completed. If so, the winner is the one with the most points.

If you’re new to Jass, you should learn the game by playing against the computer. There are different difficulty levels, so you can choose the level of difficulty that’s best for you. If you’re already familiar with Jass, you can play against your friends by sharing your own profile.