Connecting your watch

Updated on 2026-08-23

hi.fitness runs on two kinds of watch, and they connect in two different ways. Open More → Settings and look under Health & watches: on iPhone you will see Apple Health, Apple Watch and Garmin; on Android, Health Connect and Garmin. That order is the order things are set up in - the health app first, then the watch.

Apple Watch (iPhone only)

You never type a code for an Apple Watch.

  1. Open the Watch app on your iPhone, scroll to Available apps and install hi.fitness.
  2. Open hi.fitness on the watch once, with your iPhone nearby. It signs in to your account by itself.
  3. More → Settings → Apple Watch shows whether the watch app is installed, whether the watch is connected right now, and the connected watch itself - with Disconnect watch if you ever need it.

While you track a workout on the phone, the watch streams your heart rate and calories into the tracker - that is the small heart bubble on the tracking screen - and the calories it measured are saved with the workout. You can also log sets, tick off meals and dictate a meal from the wrist.

Garmin

A Garmin connects with a short code, because the watch and the phone have no direct link of their own.

  1. On the watch, open hi.fitness and press START. It shows a six-character code.
  2. On the phone, open More → Settings → Garmin → Connect a watch and type the code.
  3. The watch notices within a few seconds and pulls your plan. From then on it works on its own: today's workout, your routines, your meals and calorie ring.

On the watch you log every set with the lower-right button, change to a different workout from the stop menu, and the heart rate and calories the watch records go into Garmin Connect as a strength activity while the sets go into hi.fitness.

Disconnecting a watch

Each page manages its own watches: the Apple Watch page shows your connected Apple Watch, the Garmin page lists your connected Garmin watches. Tap Disconnect watch if you sell a watch or lend it to someone - it stops syncing with hi.fitness, and you can connect it again any time. Both pages also list what you can do on the watch.

Heart rate and calories

Both watches record heart rate and calories on the wrist. Where those numbers land on the phone is decided by the health app: switch on Import under Apple Health or Health Connect and the activity your watch recorded - including workouts tracked outside hi.fitness - shows up on your training days. See Apple Health and Health Connect for what exactly comes in.