Contraption Lab Support
Email support@pointofvu.app and we will reply within two business days.
If it’s a bug, the level number and your device model are usually all we need to reproduce it, so send those along if you can.
Common questions
How do stars work?
Every level has a par, which is the number of parts a tidy solution needs. Solve it in par or fewer for three stars, within two over par for two, and any win at all earns one. The counter in the top bar shows where you stand while you build.
I beat a level but only got one star.
Your machine worked, it just used more parts than par. The level stays beaten and the next one unlocks either way, so you can replay it whenever a better idea turns up. We only keep your best run.
The conveyor belt does nothing.
It has no power yet. A belt sits dead until the ball hits its motor, which is the small grey box wired to it in red. Once that lights up green the belt runs for the rest of the attempt.
I made a mistake building.
Undo steps back through your edits one at a time. Dragging a part back down onto the dock removes it, and Clear empties the board. You can undo that too, so it’s safe to experiment.
My progress did not move to my other device.
Progress syncs through iCloud, so both devices need to be signed in to the same Apple Account with iCloud Drive on. Sync can take a minute, and needs the app opened on both devices at least once. Half-built boards deliberately stay on the device where you built them.
How do I turn off the sound or the vibration?
The gear icon on the level list has separate switches for sound effects, music, and haptics.
Deleting your data
Settings → Reset All Progress re-locks every level and erases your stars and saved boards. It cannot be undone. Deleting the app removes everything stored on the device.