Support

There is no sign-up step. The first launch asks for a few details so doses can be worked out for your body, shows the medical disclaimer, then opens on Today’s Stack. Nothing is sent anywhere.

• Add supplements. Open the Supplements tab, pick from the 26 in the catalogue, and tap Add to My Supplements. Anything not in the catalogue can be added by hand with its own name, dose and timings.
• Tick them off. On Today, tap a supplement to mark it taken. Tap it again to undo, which removes the entry rather than storing a correction.
• Change a dose. Profile then My Supplements, or the pencil on any supplement. The default dose and timings are shown above your own, so you can always see what you changed.

Reminders live in Profile then Notifications. There are six slots and each has its own switch and its own time: morning 08:00, afternoon 13:00, pre-workout 17:00, post-workout 19:00, evening 20:00 and night 22:00. A fresh install has the morning slot and the evening streak reminder on, and nothing else.

They are local notifications scheduled by iOS on the device, so they fire with no connection and no server involved.

If nothing arrives: iOS only ever asks for notification permission once. If it was declined, the switches in the app cannot bring it back. Open iOS Settings, then FuelStack, then Notifications, and allow them there. The Notifications screen in the app has a button that takes you straight to it.

A day counts only when every supplement in your stack has been ticked off. Miss one and the count starts again at one. Adding a supplement later does not erase days you had already completed.

The evening streak reminder is cancelled as soon as you tick the last supplement of the day, so it does not nag you about a day you finished.

Without an account everything is stored on the iPhone itself. The app is fully usable that way and nothing about it is limited.

• Creating an account adds backup and restore across devices, nothing else. Sign up with an email address, or use Sign in with Apple. What you already tracked on the device is carried over the first time you sign in.
• Signing in to an account that already holds a stack restores that stack rather than merging it with what is on the device. Your local data is not deleted either way.
• Exporting. Profile, then Security & Privacy, then Export Your Data. You get a JSON file through the iOS share sheet, with or without an account.
• Deleting. Same screen. With an account the button is Delete Account and it removes the account and its rows for good. Without one it is Erase All My Data and it clears the device. Deleting the app also removes everything stored on the device.

• Reminders never fire. Check iOS Settings, then FuelStack, then Notifications. Check Focus and Do Not Disturb too.
• Sign-in fails. Sign-in needs a connection, unlike the rest of the app. If it keeps failing, write to support with the email address you used. Your data on the device is untouched in the meantime.
• A supplement looks wrong. Tell us which one and what is wrong with it. The catalogue is edited by hand and corrections ship in the next update.
• The app crashes. Update from the App Store first, then send us your iPhone model and iOS version.

FuelStack is an iPhone app and needs iOS 15.1 or later. There is no Android version and no web version. It is free, and there is nothing to buy inside it.

Write to support@thefuelstack.com. One person reads that mailbox, so include your iPhone model, your iOS version and what you were doing when it went wrong. Replies go out within five working days.

See also the privacy policy and the terms of service.