Support

Gear Ratio

Contact

For bug reports and questions, please contact us below. Your iOS version, device and the puzzle number (for example 3-14) help a lot.

Please open a "New issue" on our GitHub support page (Issues) and start the title with "Gear Ratio". A free GitHub account is required.

FAQ

What is the difference between the free and full versions?
Chapter 1 (20 puzzles) is free. The full version (one-time purchase) adds chapters 2 to 6 with 100 puzzles.

I am stuck.
Tap "Hint" to see the next gear of an answer. Remember: meshing gears turn opposite ways, and speed changes by driver teeth ÷ driven teeth.

How do I get three stars?
Solve with the fewest gears for three stars, one more for two stars.

I got a new iPhone.
Tap "Restore Purchase" with the same Apple Account, and move your stars with "Export Progress" in Settings.

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