A name, not an email. No noise. No timers shouting at you. Just a grid, a pencil, and the small click when everything finally fits. Every puzzle is built by hand-tuned algorithms to have exactly one answer, and to make you think for it.
Plane, metro, mountain hut. Your puzzles don't need a signal.
You get a name, not a sign-up form. Open the app or the site and you're already playing.
Light ads support one developer and never interrupt a puzzle. One unlock removes them for good.