Support

Open Settings › Apple Account › Subscriptions on your iPhone, or go to apps.apple.com/account/subscriptions. Cancelling at least 24 hours before the trial or period ends means no further charge. Pro stays active until the end of the paid period.

On Android, open the Google Play Store app › your profile picture › Payments & subscriptions › Subscriptions › PeakFuel Pro, or go to play.google.com/store/account/subscriptions. Deleting the app does not cancel a subscription.

Make sure the iPhone is signed in to the same Apple Account that made the purchase, then tap Restore purchases on the paywall or under You › PeakFuel Pro. Purchases follow your Apple Account, so a new phone signed in to the same account unlocks automatically.

On Android, make sure the Play Store is signed in to the Google account that made the purchase, then tap Restore purchases on the paywall or under You › PeakFuel Pro.

Refunds are handled by Apple. Request one at reportaproblem.apple.com. On Android, refunds are handled by Google under Google Play's refund policy: request one from your Google Play order history.

Not at the moment. Each Apple Account or Google account needs its own subscription.

PeakFuel reads workouts from Apple Health. First check that your wearable's app is writing workouts to Health (Health app › Profile › Apps › your wearable › Workouts on). Then in PeakFuel go to You › Wearables & apps and make sure Apple Health is connected with background sync on. Opening PeakFuel pulls in anything new; the in-app guide walks through each brand.

Garmin: turn on sharing in Garmin Connect (More › Settings › Connected Apps › Apple Health). Garmin only sends to Apple Health while the Garmin Connect app is open, so open it after your watch syncs and the session reaches PeakFuel a moment later. Garmin doesn't share overnight HRV with Apple Health: type it into the morning check-in, or link Intervals.icu (free, connected to your Garmin account directly), which brings in Garmin workouts without opening Garmin Connect, plus HRV, resting heart rate, sleep and weight. Garmin shares with Apple Health from the day you turn sharing on; for earlier workouts, link Intervals.icu, whose first sync brings in the last 30 days.

On Android, PeakFuel reads workouts from Health Connect instead. Check that your wearable's app (Pixel Watch, Galaxy Watch, Garmin, Whoop, Oura, Fitbit) writes exercise to Health Connect, then in PeakFuel go to You › Wearables & apps, connect Health Connect and keep Background sync on. Garmin shares with Health Connect on Android 14 or later; on earlier versions, link Intervals.icu instead.

Send those rides to Apple Health (Zwift Companion, TrainerRoad and Wahoo all can), or connect Intervals.icu with your API key. When the same ride arrives from a wrist device and a power source, PeakFuel keeps the power-based energy.

On Android, connect Intervals.icu (or Strava), or send those rides to Health Connect if your app supports it.

Strava sign-in appears under You › Wearables & apps when it is available in your build. Strava's API terms limit how many athletes an app may connect; if the button is missing, use Apple Health (Health Connect on Android) or Intervals.icu, which carry the same rides.

Cancel it on the Train tab. Today's targets and the meal plan update immediately, and anything you already logged stays attached to the nearest meal.

Targets follow the day's training load, your weight trend, HRV readiness and the days around a competition. Tap the i on the Today screen to see every component and the evidence behind it.

Wrist devices often underestimate rest-day expenditure and hard sessions. PeakFuel starts from published models and refits your personal baseline from your own intake and weight logs after a few weeks. Log honestly and it converges on you.

Yes. Add foods by search or barcode, build meals, save any meal as a routine that fills the plan automatically, or choose foods and let PeakFuel size the portions to the meal's targets.

You › Your data lets you export a complete JSON backup, restore it on another device, export research CSVs, or erase everything. Deleting the app deletes its data. On Android, erasing also disconnects Strava and Intervals.icu and cancels reminders. On iPhone it does neither, so before you erase, disconnect them under You › Wearables & apps and switch off the reminders on the You tab. There are no accounts and no servers, so there is nothing else to delete on our side. Read the privacy policy.

Change them any time in the Health app › Profile › Apps › PeakFuel. Health data is used only on your device to compute targets and is never sent anywhere, except in your own iCloud device backup or inside a backup or research file you export yourself.

Change them any time in Health Connect › App permissions › PeakFuel (in Android Settings on Android 14 and later, or in the Health Connect app on earlier versions). Health data is used only on your phone to compute targets and is never sent anywhere, except inside a backup or research file you export yourself, or in a direct transfer to your new phone.