Carbon works with Apple Health (iOS) and Google Health Connect (Android) to help you keep your health data in one place.
What Data is Synced
Body Weight & Body Fat
Read-only: Carbon reads these values from your health app.
If you log weight or body fat in Apple Health or Google Health Connect, Carbon will pull those numbers into your account automatically.
We only sync body fat if there’s a weight recorded on the same day. This ensures we can calculate your lean body mass accurately.
Carbon does not send weight or body fat you log in the app back to your health app.
Nutrition Data
Write-only: Carbon sends your food diary entries (calories, macros, and available micronutrients) to your health app.
We do not import nutrition data from other apps.
Other apps connected to Apple Health or Google Health Connect can read this nutrition data if you give them permission.
How to use Apple Health
View our article on our Apple Health integration.
How to use Google Health Connect
View our article on our Google Health Connect integration.
Important Notes:
Syncing starts from the day you turn it on — historical data will not be imported unless you manually change the Starting date.
If data isn’t syncing, see our Troubleshooting guide