Asterism is a calm hex logic puzzle where you never have to guess. Each number counts the stars around its hex, like Minesweeper, but a solver checks every puzzle so logic alone solves it, and each solved puzzle turns into a constellation. Seven hand-made worlds each add a new rule, there is a new puzzle every night, and Deep Sky holds 4,000+ generated puzzles you pick by rule and depth. Hints explain the reasoning. Android, free to start, no ads, works offline.
