The simplest app to determine single speed gear ratios for your bicycle.

Available ranges for everything from 29er mountain bikes to fixie road bikes.

What’s New

Version 1.2

This app has been updated by Apple to display the Apple Watch app icon.

Updated to support iOS 11 and iPhone X.

Ratings and Reviews

3.0 out of 5
2 Ratings

2 Ratings

Butterbro-53 ,

Not bad

Straight forward but not wide enough gear selection, chain ring needs to go as low as 22, and cassette as low as 10 and as high as 51

App Privacy

The developer, Fraser Moore, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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