Privacy policy
PeakFuel runs on your device. Your profile, weigh-ins, HRV, food logs and training sessions are stored in the app's private storage on your iPhone and in your own iCloud device backup. PeakFuel has no accounts, no servers of its own, no advertising and no analytics.
Apple Health
With your permission PeakFuel reads workouts, active energy, steps, body mass, heart rate variability and resting heart rate, and can write the nutrition and water you log. Health data is used only to compute your targets on the device. It is never sent to us or to any third party, never used for advertising or marketing, and never shared with other apps or data brokers.
Network requests
These features talk to the internet, each only when you use them:
- Food search and barcode scanning query Open Food Facts (openfoodfacts.org) with the search text or barcode you entered. Open Food Facts is an open database run by a non-profit; its own privacy policy applies to that request.
- Training-calendar sync fetches the calendar link you pasted (for example from TrainingPeaks or Intervals.icu). The link is stored only on your device.
- Purchases are handled entirely by Apple through the App Store.
No request carries your identity, your health data or your logs.
Strava and Intervals.icu
You can optionally link a Strava account (OAuth, read-only access to your activities) or an Intervals.icu account (your personal API key). PeakFuel then fetches your activities and planned workouts directly from those services to your phone. The access token or key is stored in your iPhone's Keychain and is used for nothing else. PeakFuel never posts to these services, never shares your data with them, and disconnecting removes the token immediately. Their own privacy policies govern the data they hold.
Background activity
With your permission, iOS wakes PeakFuel briefly when Apple Health receives a new workout, weigh-in or step batch, and occasionally to refresh linked services. These wake-ups only read data into the app on your device.
Purchases
Subscriptions and the lifetime purchase are processed by Apple. PeakFuel receives only an anonymous entitlement (whether Pro is active and until when). We never see your payment details.
Your data, your control
Export a complete JSON backup, restore it on another device, or erase everything from the You tab at any time. Deleting the app deletes its data. Because there are no accounts, there is nothing for us to delete on your behalf, and nothing we could hand over.
Young athletes
PeakFuel is designed for athletes aged 16 and over. It is not directed at children under 13 and does not knowingly collect information from them. Under-18 athletes receive more conservative targets and should use the app with a parent, coach or dietitian.
Not medical advice
Targets are educational and built from published consensus statements. They are not a diagnosis or a treatment plan. Athletes with an eating-disorder history, diabetes, kidney disease, or who are pregnant should follow their clinician's guidance.
Changes and contact
If this policy changes, the effective date above changes and this page is updated. Questions and data requests: the support page or the support link on the App Store listing.