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Privacy and Data

Updated February 6, 2026

Fuel is designed so your health record stays under your control, with Apple Health as the storage layer and permissions as the enforcement layer.

Where your data lives

Apple Health stores your activity, workouts, nutrition logs, and body metrics on your device. Fuel reads and writes only the categories you allow.

Fuel does not store your Apple Health history in a Fuel managed cloud database. Your day to day record remains in Apple Health and on your devices.

What permissions actually mean

Permissions are the boundary.

If you deny a category, Fuel cannot access it. If you revoke a category later, Fuel loses access going forward. If you want to audit access, Apple Health provides the category list that Fuel can read and write.

Use Apple Health Permissions to inspect and adjust access.

AI features and submitted content

AI features exist to turn messy inputs into structured entries and to summarize patterns into plans.

When you submit a photo or text for AI food logging, Fuel uses that submission to produce a nutrition entry. Keep the record accurate by verifying the result before saving.

Removing access

If you want to stop using Fuel, remove app access in Apple Health and uninstall the app. Apple Health remains the canonical record unless you delete the health data itself inside Apple Health.