ChainLab / Support
Contact OOTSSU at ootssu@ootssu.com for app issues, purchases, data questions, or feedback.
Open Compare, change the rear cog on each card, then choose Same Cadence or Same Speed. Adjust the virtual grade to see how the estimate changes.
Open the Pro screen and tap Restore using the same Apple Account that made the purchase. If access does not return, email us with the app version and a description of the issue; please do not email payment card details.
Saved bicycle setups live on your device. Deleting the app removes local setups. Subscription status is supplied by Apple and RevenueCat.