Last updated: September 27, 2026
Your food diary, saved foods, goals, and weight entries are stored on your device and backed up to your own private iCloud database, which only you can access. We cannot read your iCloud backup. This data is used for nothing else.
When you use the AI meal scan, the photos you choose are sent to our server and passed to an AI processing service (Google's Gemini API) to identify the food. These scan photos are processed transiently on the server and are not kept there; the app keeps a copy on your device for about 30 days so you can rescan a meal. Separately, if you choose to submit a barcoded food to the shared database, the nutrition label photo you provide is stored on our server so a human can verify the numbers before they are published; it is used for nothing else.
The app sends anonymous usage events (for example that a scan happened, or a session's length) under a random install identifier. These never include food names, goals, weights, or anything from your diary, and are never used for advertising. You can turn this off in Settings.
Barcodes and food names are looked up against public nutrition databases (Open Food Facts and USDA FoodData Central). Only the barcode or search text is sent, never your identity.
With your permission, the app reads your body weight from Apple Health. It never writes anything to Apple Health. Health data never leaves your device except into your own iCloud backup described above.
If the app crashes, the next launch uploads a technical crash report (app and iOS version plus a stack trace, tagged with the same random install identifier as the usage analytics; never any of your diary data). Turning off "Share anonymous usage stats" in Settings also stops crash reports.
If you choose to sign up for updates, your email address is stored with our email provider (Brevo) and used only for occasional product emails. Every email includes an unsubscribe link.
Subscriptions are processed entirely by Apple. We never see your payment details.
Delete the app to remove on-device data. Your iCloud backup belongs to your Apple account, not to us: remove it in iOS Settings, tap your name, then iCloud, then Manage Account Storage, and delete Macro Engineer's data. To have your email or any community food submission removed, contact us and we will delete them.
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