*Last updated: October 18, 2026*
1/12 Rollout does not collect, store or share any personal information.
- The app has no accounts, no advertising, no analytics and no tracking.
- The setups you save (gearing, tire size and notes) are stored only on your
iPhone, in the app's own storage. They are never sent to us or to anyone else.
- The app does not connect to the internet.
- Deleting the app deletes your saved setups. If you use iCloud or iTunes device backups, Apple may include the app's data in those backups, as it does for any app; that is handled by Apple, not by us.
If this policy changes, the new version will be posted on this page with a new date.
Questions, bug reports or feature ideas: alonzo.hess@pm.me
Please include your iPhone model and iOS version if you're reporting a problem.
**How rollout is calculated:** 1/12 pan cars are direct drive, so
rollout = π × rear tire diameter × pinion ÷ spur. For example, a 40T pinion on a
78T spur with 42.0 mm tires gives 67.7 mm (2.664") of rollout.