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Apple Health Permissions
Updated February 6, 2026
Apple Health is the storage layer for Fuel, so permissions decide whether your dashboard reflects your day or a partial record.
Read and write permissions
Fuel needs permission to read activity context and to write nutrition logs in a structured way.
Read permissions typically include active energy, workouts, and body weight if you want targets checked against trend. Write permissions typically include nutrition categories such as calories, macros, micronutrients, water, and caffeine so your log becomes part of your Apple Health record.
Fuel will still open if you deny a category, but any view that depends on that data will be wrong or blank because Apple Health is missing part of the record.
Permission map
This table is a practical translation from permissions to app behavior.
| Permission | Fuel uses it for | If denied you will notice |
|---|---|---|
| Active Energy and Resting Energy | Targets, Energy Balance, daily and weekly reviews | Remaining calories and energy context will look flat or incorrect |
| Workouts | Training context in Today, reviews, and Coach Chat | Workouts will not appear and training days will be harder to interpret |
| Body Weight | Weight trend, target checks against outcomes | Trend will be missing and coaching will have less to check targets against |
| Nutrition categories | Food logging, macro targets, micronutrient targets | Logged meals may not save correctly and nutrition totals may be missing |
| Water and Caffeine | Hydration and stimulant tracking | Water and caffeine views may be empty even if you logged them |
| Height, date of birth, biological sex | Profile context and some estimates | Some estimates may fall back to defaults |
Granting or changing permissions
- Open iOS Settings.
- Open Health.
- Open Data Access and Devices.
- Select Fuel and adjust the read and write categories you want enabled.
If you do not see Fuel listed, open Fuel once and trigger a permission prompt by entering a feature that requests Apple Health access.
Data sources and duplicates
Apple Health can store the same category from multiple sources. That can inflate totals if two sources write overlapping workouts or energy records.
If your totals look too high or too low, inspect the data source list in Apple Health for the category that looks wrong and ensure the source you trust is prioritized. Apple Watch is usually the best source for activity context when you wear it consistently.
Verifying the record
When you are debugging, use Apple Health as the arbiter.
If Apple Health is missing the data, Fuel cannot infer it. If Apple Health contains duplicates, Fuel will reflect the duplicates until the data source issue is resolved.