Contraptor

Contraptor is a physics playground where you build machines to solve hand-crafted puzzles. Drop in rods, wheels, pins, motors, and welds, wire up a contraption, hit Play, and let real physics decide how it works.

Every challenge is a puzzle: get the payload (or many payloads) to the target(s) using whatever that challenge allows. Some let you shove pieces around, some ration your parts, some bend the rules with wormholes and moving hazards. Solve it and you've earned bragging rights. Then flip it around — design your own challenge, prove it's actually solvable if you'd like, and dare the community to crack it.

• Build with real 2D physics — mass, gravity, momentum, friction, bounce, damping, and even motors. • Solve a growing library of community challenges • Design your own, optionally prove they're solvable, and post them • Rate and follow other builders, and climb the leaderboards • Hands-on tutorials that teach every tool • Universal — iPhone and iPad

Seeing a solution isn't the same as building one. That skill gap is the whole game.

Contraptor uses your iCloud account for community features (posting, rating, following, leaderboards, usernames). You can build, follow the tutorials, and browse and play everything in the Community without iCloud — it's only needed to post or interact. iCloud is free.

Designed by JohnCowMilk · Built in Xcode with Apple's Coding Intelligence and Claude · Physics by Box2D