How a lock plays
Keep light tension (relaxed mode does it for you), find the pin that feels heavy, and push it up gently until it clicks. Push too hard and the pins drop back: no lives, no game over, just try again.






Free to play, Pro if you want more
Free
- 120 lock puzzles on 6 workshop shelves, 3 to 7 pins
- Spool pins with false sets, serrated pins and double cylinders
- A cabinet of 120 keepsakes, each with a short owner story
- A daily lock and ranks from apprentice to master
Pro
One-time purchase, about US$3.09 in the United States
- A shelf of 30 expert puzzle boxes with layered cylinders
- No pop-up ads
- Unlimited cutaway view to see the pins inside
Fair by design
- No ads in your first 3 locks; a full-screen ad can only come after a lock opens, never while you pick
- Rewarded videos are always optional: watch one for an extra pin peek
- Plays offline, no account needed
- English, German, Spanish, Portuguese and French
Coming soon to Google Play