HRM Heart Rate Monitor App User Guide

The exact sensor pairing procedure depends on your Garmin Edge model, but the following is true for most devices:

1. Fully terminate the Garmin Connect app on your iPhone
2. Open the HRM App on your iPhone and on your Watch
3. Press "Start" (on your Watch) and make sure the blue circles are radiating (on your iPhone)
4. Only required on the latest models: On your Garmin, disable the regular Phone connection under "Main Menu" > "Connected Features" >"Phone"
5. Then go to "Main Menu" / "Settings" > "Sensors" > "Add Sensor"
6. The HRM App should now be discovered by the Garmin device

If you disabled the Phone connection at step 3, you can re-enable it after initial pairing. Beware that you probably need to work around the Garmin Edge phone connection limit described below.

Some Garmin Edge models (e.g. 540/840/1040) only allow one active phone connection at a time. This creates a race condition between Garmin Connect and the HRM app. Once the initial setup is made, the following procedure makes sure the HRM app is able to connect:

1. If needed, sync your Garmin Edge with the Garmin Connect App
2. Power off the Garmin Edge and terminate the Garmin Connect app
   👆 This step is crucial!
3. Open the HRM App on your iPhone and on your Watch
4. Press "Start" (on your Watch) and make sure the blue circles are radiating (on your iPhone)
5. Power on your Garmin Edge
6. You should now see the heart rate sensor connection

If the heart rate sensor isn't already discovered, you may need to re-connect as described below.

If you wish to connect to the Garmin Connect app instead of the HRM app, turn off your Garmin Edge, close the HRM app, open the Garmin Connect app, and then turn on the Garmin Edge.

If you already paired the HRM app as a heart rate sensor, but it isn't actively connected anymore, the following steps should re-connect your heart rate sensor:

1. Open the HRM App on your iPhone and on your Watch
2. Press "Start" (on your Watch) and make sure the blue circles are radiating (on your iPhone)
3. On your Garmin, go to "Main Menu" / "Settings" > "Sensors" > "HRM App"
4. Toggle "Status" / "Enable" or "Connect"
5. The HRM App should now be discovered by the Garmin device

If the above doesn't work, you may need to remove the heart rate sensor and redo the pairing procedure.

The following procedure should be applicable for all Wahoo ELEMNT ROAM & BOLT devices:

1. Fully terminate the Wahoo app on your iPhone
2. On your Wahoo, go to the settings menu, then scroll to "ADD SENSOR"
3. Make sure to have the iPhone app open and press "Start" on the Apple Watch, then bring your iPhone close to your ELEMNT
   (Beware that only sensors broadcasting a "plausible" heart rate (> 60 BPM) get discovered)
4. Select "ADD" – the sensor with the highest signal strength will be displayed, which should be your iPhone – and then select "SAVE" to pair the HRM app sensor

Pairing the HRM app as a Heart Rate sensor for your Karoo 2 works as follows:

1. Go to the "SENSORS" menu
2. Press "+" to add a new sensor
3. Make sure to have the iPhone and Watch app open, and press "Start" on the Apple Watch
4. The Karoo 2 should now discover the HRM App as a heart rate sensor
5. On your iPhone, a "Bluetooth Pairing Request" will appear. Press "Pair".
6. You should now see your current heart rate on the Karoo 2

In case you're also using another heart rate sensor with your Karoo (e.g. a chest strap), make sure to disable it within the "SENSORS" menu before connecting the HRM app.

If you already paired the HRM app as a heart rate sensor, but it isn't actively connected anymore, the following steps should re-connect your heart rate sensor:

1. Open the "SENSORS" menu on your Karoo 2 and delete the HRM App
2. Within your iPhone's Bluetooth Settings, delete (i.e. "forget") “Karoo 2” and “Karoo 2 BT Audio”
3. Re-add the HRM App as described above

Connecting the HRM App to ROUVY is pretty simple:

1. Within ROUVY, go to "Settings" > "Sensors" to open the "Cycling Devices" overview and press "Add sensor" within the "Heart Rate" box
2. Open the HRM App on your iPhone and Apple Watch, then press "Start"
3. ROUVY should now discover your iPhone as a heart rate sensor

Please beware that ROUVY must run on another device than your iPhone.

Connecting the HRM App to TrainerRoad is pretty simple:

1. Within TrainerRoad, go to the "Devices" tab
2. Open the HRM App on your iPhone and Apple Watch, then press "Start"
3. TrainerRoad should now discover your iPhone as a heart rate sensor. Press "Pair Device" if it isn't already.

Please beware that TrainerRoad must run on another device than your iPhone.

Connecting the HRM App to FulGaz is pretty simple:

1. On the FulGaz main overview, tap "Connect Devices"
2. Open the HRM App on your iPhone and Apple Watch, then press "Start"
3. FulGaz should now discover "HRM App" as a Bluetooth heart rate sensor

Please beware that FulGaz must run on another device than your iPhone.

Connecting the HRM App to TrainerDay is pretty simple:

1. Go to "Settings" > "Add Devices" and press the plus icon
2. Open the HRM App on your iPhone and Apple Watch, then press "Start"
3. TrainerDay should now discover your iPhone as a heart rate sensor, listing it under "Connected Devices"

Please beware that TrainerDay must run on another device than your iPhone.

In general, sensor pairing works as follows:

1. Go to the "Sensor" settings menu and select "Heart Rate"
2. Make sure to have the iPhone app open and press "Start" on the Apple Watch
3. Your bike computer should discover the HRM App and indicate further steps

If "--" is shown, this means that there is no recent heart rate data available through Apple Health. This can be the case if your Watch is on Low Power Mode, you just put it on, or your Health permissions are missing.

You can check and grant permissions at Settings (on your Watch) > Health > Apps > HRM.

If you're still having issues, disabling and re-enabling the Heart Rate permissions seems to finally solve the problem.

Yes. Doing so will start the frequent collection of heart rate data and keep your session running in the background, i.e. also when either app is not visible.

No. You can use your phone regularly while the HRM app is kept running in the background to send heart rate data via Bluetooth to connected devices. You can also lock your phone.

Yes. If you want frequent heart rate updates, the Watch app must be kept open during your workout session.

Just as long as when tracking an indoor cycling workout (i.e. no GPS needed on the Watch). The HRM app doesn't drain your Watch's and iPhone's battery any more than tracking an indoor workout would.

I've already used the app on 8+ hr rides with about 30% battery left on my Watch Series 7 after it.

No. The Apple Watch only allows one workout session to be active at a time. So you can either use the HRM app or any other workout app (e.g. Apple Fitness) at a time.

If your heart rate is only updating if you look at your Watch (i.e. turn your wrist), then the HRM app's Background App Refresh permission is probably missing.

To fix this, enable Background App Refresh for both the HRM and the Apple Fitness app. You can do so under Settings > General > Background App Refresh.