A backgammon clock for two players sharing one phone between them. Reserve time plus a fixed number of free seconds each turn that never carry over. Defaults to 3:00 with a 12 second delay.
It asks for no permissions at all. There is no network access, no analytics, no accounts, no ads, and nothing to configure before you can play. The whole clock is a single HTML file inside the app.
Set the match length to any odd number of points up to 29. The time you set is per point, so a 5-point match at 2:00 a point puts 10:00 on each clock. Each half of the screen reads the score from that player's own side of the board, so both players see their own score on the top line.
Settings and the match in progress are kept on the device: the score, both clocks, the move counts, whose turn it is and how much delay was left. Force-quit it mid-match and it all comes back. The one thing it can't restore is time that passed while the app was closed, so it returns paused rather than charging anyone for the gap — a crash shouldn't decide a game.
