RunPackGuides · 5 min read
Using Garmin or WHOOP with Apple Health: what syncs, and what doesn’t
Garmin Connect and WHOOP can write to Apple Health — but not everything. What gets shared, why HRV usually doesn’t, and what that means for apps that read Health.
If you wear a Garmin or a WHOOP and use an iPhone, Apple Health can become the place where all your data meets — but only the data each company chooses to write there.
Garmin
Garmin Connect can share sleep, steps, active energy, heart rate and workouts with Apple Health once you turn on the connection in its settings. Heart rate variability generally isn’t shared, so apps that read Health can’t use Garmin’s HRV.
WHOOP
WHOOP can write sleep, resting heart rate, breathing rate and workouts to Apple Health. It measures HRV in a different way from the measure Apple Health stores, and doesn’t write it there.
What that means in RunPack
Without HRV, RunPack builds a recovery band from what is shared — mostly sleep and resting heart rate — and says plainly that your device doesn’t share HRV. It doesn’t invent a precise-looking number. Apple Watch shares HRV, so it gets the full 0–100 score.
Wearing two devices
Plenty of people wear an Apple Watch by day and something else at night, or record a run on both. RunPack takes each signal from one device per night or per workout, so the same sleep or run never counts twice.
What each manufacturer writes to Apple Health can change with their app updates. Garmin and WHOOP are trademarks of their owners; RunPack isn’t affiliated with them.