Une énigme par jour, à 15 h 37 précises

15h37 Games is an independent game studio run by 15H37, a company based in Le Taillan-Médoc on the edge of Bordeaux. Our first Android game unlocks exactly one puzzle a day, at 3.37 in the afternoon.

The time is a nod to the company name and a good moment for a short break. Each puzzle takes between two and ten minutes and never repeats a format two days in a row.

One day brings a small maze, the next a coded message, a clock to set, a set of weights to balance or a map with a missing road. A single gentle hint is available for each puzzle, and players who prefer to wait can see the full solution the following afternoon.

There is no public leaderboard and no streak to protect. Missed puzzles stay in an archive that can be played at any time, so a busy week never means losing progress.

The interface is deliberately quiet, with a clock face, a warm paper texture and one puzzle on the screen. Notifications are off by default and, if switched on, send a single reminder at 3.37 pm.

We write and test every puzzle in advance and keep a calendar several months ahead, so each day feels fresh without becoming harder for its own sake. Players can suggest a puzzle by post, and suggestions that make it into the calendar are credited by first name or initials if the author wishes. A weekly summary page lets players look back at the past seven puzzles and compare the hint they used with the intended path, which many testers told us was their favourite part of the routine. Puzzles are written in French and English, and the language can be switched at any time from the settings screen.