Terms of Use

Use the app lawfully and follow the rules of your club, field and aviation authority.

Do not attempt to disrupt, resell or reverse engineer the app.

Pro is available as a yearly subscription with a free trial, or as a one-time lifetime purchase.

Subscriptions renew automatically unless cancelled at least 24 hours before the end of the period in your Apple Account settings. The lifetime purchase does not renew.

Guides, voltage tables and calculators on this site are general information. Always follow the specifications of your battery, charger and model manufacturer.

Lithium batteries can catch fire if damaged, overcharged or over-discharged. You are responsible for charging, storing and flying safely.

The website and app are provided as-is, without warranties.

We are not liable for indirect or consequential damages, including damage to models, batteries or property.

We may update these terms. Continued use means you accept the updated terms.

Questions? Email hello@fangfang.me. Full app terms: https://fangfang.me/docs/app-terms-of-use.