Doubled or mismatched readings

When two devices write the same thing, tell Apple Health which one comes first.

If you wear a watch and a ring, or sleep on a smart pad, two devices may write the same thing to Apple Health. Health then has to choose which to count.

Set the order

  1. Open the Health app and tap Browse (on newer iOS, the Search button at the bottom right).
  2. Pick a category, like Sleep, then the metric.
  3. Scroll down and tap Data Sources & Access.
  4. Tap Edit and drag the device you trust most to the top.
  5. Tap Done.

Health counts the top source first and fills gaps from the others. Soma reads the result.

A device you connect later goes straight to the top of the list, above your iPhone and your watch. After adding one, check the order.

Which to put first

  • Sleep: the device you wear most reliably every night.
  • Heart rate: a chest strap during workouts beats a wrist.
  • Weight and body fat: your scale.

The quality marks on each source in the Vault can help you choose.

Didn't find what you need? Email quentin@somalabs.me with a screenshot, or search all of Help.