Terms of use

Updated October 13, 2026

These terms cover your use of the Crab Angle app and the one-time Pro purchase.

Planning aid only

Crab Angle is a planning aid. It is not for flight operations. Always verify results with the AFM/POH and your approved sources. You remain responsible for every decision you make.

Sample data

The N172SP profile is a sample, not data for a real aircraft.

Pro purchase

Pro is a one-time purchase handled by Apple through the App Store. It is not a subscription. Payment, refunds and Restore Purchases follow Apple's rules.

No warranty

To the extent allowed by law, the app is provided as is, without warranty of any kind, and the maker is not liable for loss or damage arising from its use.

Apple standard EULA

Apple's standard Licensed Application End User License Agreement applies to the app.

Contact

Questions about these terms: sanghuynhxuan@gmail.com. Crab Angle is made by Sang Huynh Xuan.