Hi. I'm the developer of MacroStack AI. This is a one-person indie app, which means when you email support, I read it. No ticketing queue, no outsourced reply team. If something is broken, confusing, or missing, I want to hear about it.
Get in touch
Typical response time: within 2 business days. Please include your device model and iOS or Android version if you're reporting a bug.
Quick answers
I logged a food and the macros look wrong. Can I fix it?
Yes. Tap the food entry in your Daily Log to open it, then edit the calories and macros directly. Changes are local to that entry and won't affect the original food in the database.
The AI food scanner got the food wrong. What do I do?
Tap the result to edit it before saving, or tap Scan Again to retake the photo. For best results, take a top-down photo with good lighting and include a reference object (fork, hand) to help the model estimate portion size. Photos of packaged food labels work better than photos of the food itself for branded items.
Why does my calorie goal keep changing?
That's the auto-adjustment feature working as intended. Every week on your weigh-in day, MacroStack recalculates your calorie target based on your actual weight trend and food logging. If you're gaining when you shouldn't be, your target drops. If you're losing when you shouldn't be, it rises. You can turn this off in Settings under Goals if you'd rather lock in a fixed target.
Does it work offline?
Mostly. Manual food logging, barcode scanning of items in our bundled database, weight tracking, macro math, and the calorie ring all work without internet. The AI Food Scanner and AI Coach require an internet connection because they call a cloud AI model.
How do I export or back up my data?
MacroStack backs itself up. On iOS it keeps a backup of everything on its own, at most once an hour, in the Files app under On My iPhone → MacroStack → Backups, and every backup of your iPhone carries that folder along. For a copy you control, Settings → Export My Data gives you a JSON file covering your food log, weight history, goals, and (optionally) chat history, which you can password-encrypt. Neither file ever touches our servers; the export is shared directly from your device through whichever method you pick (AirDrop, Files, email, etc.).
I deleted the app and my data is gone. Can I get it back?
Deleting an app on iOS deletes its folder, including MacroStack's automatic backups, and we hold no copy. In order of least effort:
- iCloud Drive backup was on. Reinstall and open the app: it finds the copy in your iCloud Drive and offers it before the setup screen. Nothing else to do.
- An export you saved. Reinstall, then on the setup screen tap Returning user? Import your data and pick the file. Everything in it comes back.
- Apple Health. If Health sync was on, your weigh-ins are still in Health. Reinstall, set up, then turn on Settings → Privacy → Sync with Apple Health: they come back on their own. Meals are not stored in Health.
- A backup of your iPhone made before the deletion (iCloud Backup or a computer backup). Restoring the phone from it brings the app's folder back, and MacroStack then offers your data before the setup screen. This restores the whole phone to that point, so it is the last resort.
To avoid the question entirely: turn on Settings → Backup → iCloud Drive, and export before you delete.
How do I delete my data?
Settings → Reset App wipes all local data: food log, weight history, profile, goals, chat history, and the automatic backups. Because MacroStack doesn't have user accounts or cloud storage, deleting the app from your device also deletes all personal data associated with it. There's nothing we need to delete on our end, because we don't have it.
Does MacroStack have ads?
No. No ads, no ad tracking, no data sold. Never planned, never coming.
Does MacroStack sync with Apple Health?
Yes, on iOS, and only if you turn it on in Settings → Privacy. MacroStack then writes your weigh-ins and each day's calories, protein, carbs, and fat to Apple Health, and brings in weigh-ins that other apps or a smart scale add to Health. Turn it off any time in the app, or revoke access in iOS Settings → Privacy & Security → Health → MacroStack AI.
Does MacroStack work with my scale or watch?
Yes, through Apple Health. In your scale's or watch's app, turn on writing weight to Apple Health. Then in MacroStack turn on Settings → Privacy → Sync with Apple Health. Weigh-ins show up in the Weight tab the next time you open the app, and they count toward your weekly recalibration like one you typed in. Calories your watch estimates are not used, on purpose: MacroStack measures your real burn from what you log and what you weigh, and a watch's estimate would only add noise to that.
Is my food log private?
Yes. Your food log, weight history, goals, and profile are stored on your device only. They never touch our servers. The only data the app sends to us is a randomly generated device identifier used for AI rate limiting. See the full privacy policy for details on how AI features handle the photos and messages you submit to them.
Report a bug
Email the address above with:
- What you were doing when the bug happened
- What you expected to happen
- What actually happened
- Your device model (e.g., iPhone 15 Pro) and OS version
- App version (Settings → About)
- A screenshot or screen recording if you can
The more detail, the faster I can fix it.
Feature requests
Have an idea for something MacroStack should do? Email it in. I read every one, and real user requests are the main input for what ships next. I can't promise to build everything, but I can promise to read everything.