Supported devices

Put the clip on a finger and switch the sensor on. Gives heart rate, pulse wave and full HRV.

Buy StressLocator BM1000C in the Happy Electronics shop

How to switch on

1. Switch the sensor on and put the clip on the index or middle finger.
2. Keep the hand still and relaxed; the finger must not be cold.
3. Choose Bluetooth in the app. The sensor is found by name (StressLocator, Schiller, VS, AR).

Models: StressLocator and compatible finger sensors (BCI protocol)

Moisten the strap electrodes and put it on; it starts sending by itself. Gives heart rate and beat-to-beat intervals, so HRV works too. Nothing to pair in the phone settings.

How to switch on

1. Wet the electrode areas of the strap, fasten it around your chest and snap the sensor onto the strap.
2. The strap transmits automatically once worn, there is no button. Tap Connect in this app; the sensor shows up as “Polar H10 …” (or H9 / H7).
3. If it is not found: close the Polar Flow or Polar Beat app and disconnect the strap from your watch. H9 and H7 allow one Bluetooth connection, H10 two (“2 Bluetooth devices” in Polar Flow, firmware 2.1.9 or newer).
4. After the session unsnap the sensor from the strap, otherwise it stays on and drains the battery.

Models: H10, H9, H7

Switch the band on with the button; it stays in heart rate mode (blue side LED). Heart rate shows right away, intervals for HRV arrive after about 25 seconds and only while you keep still; moving the arm interrupts HRV.

How to switch on

1. Put the band on your forearm or upper arm (Verity Sense also on the temple with the swim clip), sensor snug against the skin.
2. Press the button. Verity Sense starts in heart rate mode: green LED next to the heart icon and a blue side LED. Do not switch to recording mode (green side LED) or swimming (white); the band does not transmit in those.
3. Wait until all six LEDs light up, then tap Connect in this app. The band shows up as “Polar Sense …” or “Polar OH1 …”.
4. Sit still with a relaxed arm. Heart rate shows immediately, HRV after about 25 seconds. If HRV never comes, close Polar Flow (the band handles two Bluetooth connections at once).
5. Switch off: hold the button until the LEDs go out.

Models: Verity Sense, OH1 / OH1+

On the watch open Start training, in the pre-training settings choose “Share HR with other devices” and switch on “Heart rate visible to all”. The watch sends heart rate only, no HRV.

How to switch on

1. On the watch hold OK (or press BACK for the menu) and choose Start training, pick any sport. Stay on the pre-training screen, do not start the session.
2. Newer firmware (Vantage V3 / M3, Grit X2 Pro, Pacer, Ignite 3, 2025): open Settings (icon or LIGHT button) › Share HR with other devices › Heart rate visible to all › On. The choice is remembered for that sport.
3. Older watches (Vantage V2 / M2, Grit X, Ignite 2, Unite): quick menu › Share HR with other devices › Add a new device (or “Use watch as heart rate sensor”), then tap Connect in this app and accept the pairing on the watch.
4. Tap Connect in this app. The watch shows up as “Polar …”. Sharing ends when you leave the pre-training screen, so keep it open for the whole session.

Models: Vantage V3 / M3, Grit X2 Pro / X2, Pacer / Pacer Pro, Ignite 3, Vantage V2 / M2, Grit X / X Pro, Ignite 2, Unite, Polar Loop (2025) / Polar 360

On the watch turn on Broadcast Heart Rate, usually Settings › Wrist Heart Rate › Broadcast Heart Rate. Works on models from 2019 on (fenix 6 and newer, Forerunner 55/245 and newer, Venu 2 and newer, vivoactive 5 and newer, Instinct 2 and newer, vivosmart 5). Heart rate only, no HRV.

How to switch on

1. Wear the watch on your wrist and turn on Bluetooth on the phone. Broadcasting is switched on by itself, you do not need to start any activity (run, walk).
2. fenix 7, epix, MARQ, Descent, Instinct 2 and 3: hold MENU, choose Sensors & Accessories › Wrist Heart Rate › Broadcast Heart Rate and press START (GPS button on Instinct).
3. fenix 8, Enduro 3, Forerunner 570 and 970: hold the middle left button, choose Watch Settings › Health & Wellness › Wrist Heart Rate › Broadcast Heart Rate and press the upper right button.
4. Forerunner 165, 255, 265, 955, 965: hold UP, choose Health & Wellness › Wrist Heart Rate › Broadcast Heart Rate and press START.
5. Venu 3, vivoactive 5: press the lower button, choose Settings › Watch Sensors › Wrist Heart Rate › Broadcast Heart Rate and confirm with the upper button. Venu 4, Venu X1, vivoactive 6: press the button, choose Settings › Health & Wellness › Wrist Heart Rate › Broadcast Heart Rate.
6. Venu 2, Venu Sq 2: hold the lower button, choose the gear icon › Wrist Heart Rate › Broadcast.
7. fenix 6, Forerunner 945: from the heart rate widget hold MENU, choose Heart Rate Options › Broadcast Heart Rate and press START. Forerunner 55 and 245: from the heart rate widget hold UP and choose Options › Broadcast Heart Rate.
8. vivosmart 5: press the button, choose the heart icon and then the broadcast heart rate icon. The time stays on the display.
9. Tip: you can add the Broadcast Heart Rate icon to the controls menu (hold LIGHT, CTRL on Instinct). Next time one long press is enough.
10. In the app choose Garmin watch and pick it from the list by its model name (for example Forerunner 255, fenix 7, Venu 3).
11. During the session leave the watch on the broadcast screen. Do not switch to other screens or press buttons, otherwise broadcasting stops.
12. After the session stop broadcasting with STOP (saves battery). The watch broadcasts to at most two devices at once, disconnect any bike computer or other app.

Models: fenix 6 / 6S / 6X (all), fenix 7 / 7 Pro, epix Gen 2, MARQ Gen 2, Descent Mk2 / Mk3, quatix 6 / 7, tactix 7 / Delta, fenix 8 / fenix E / fenix 9, Enduro 3, tactix 8, quatix 8, Enduro / Enduro 2, Forerunner 245 / 945, Forerunner 55 / 70 / 745, Forerunner 165 / 170 / 255 / 265 / 265S / 955 / 965, Forerunner 570 / 970, Instinct 2 / 2X / 2 Solar, Instinct 3, Instinct E, Instinct Crossover, Venu 2 / 2S / 2 Plus, Venu Sq 2, Venu 3 / 3S, vivoactive 5, Approach S70, Venu 4, Venu X1, vivoactive 6, vivosmart 5, D2 Air / Mach, Descent G1 / G2, Approach S50, CIRQA band, Lily 2 Active, NOT supported (ANT+ only): vivoactive 4, Venu (2019), Venu Sq (2020), vivomove, Instinct 1 / Solar, Forerunner 35 / 45 / 235 / 935, fenix 5, vivosmart 4

Garmin HRM-Dual, HRM-Pro (Plus), HRM-Fit, HRM 200 and HRM 600 chest straps. Heart rate always, HRV reliably only with HRM 200 and HRM 600 (older straps may not send beat intervals).

How to switch on

1. Wet the strap electrodes with water and put the strap on just below the chest, module facing forward. HRM-Dual, HRM-Pro and HRM-Fit wake up and start transmitting.
2. HRM 200 and HRM 600: press the button on the module to wake it up. If the LED flashes twice (secure connection), press the button twice quickly so it flashes three times (open connection, which the app needs). Hold the button for 4 seconds to enter pairing mode for 5 minutes.
3. Do not pair the strap in the phone Bluetooth settings. In the app choose Garmin chest strap and pick it from the list (name starts with HRM).
4. The strap handles 2 (HRM-Dual, HRM-Pro) or 3 (HRM 200, HRM 600) Bluetooth connections at once. If you also use it with a Garmin watch, keep the watch paired over ANT+ so Bluetooth stays free.
5. After the session take the strap off, it switches off by itself.

Models: HRM-Dual, HRM-Pro / HRM-Pro Plus, HRM-Fit, HRM 200, HRM 600, NOT supported: HRM-Run, HRM-Tri, HRM-Swim, HRM3, soft strap

Galaxy Watch does not broadcast on its own. Install the free Heart for Bluetooth app from the Play Store on the watch, start it and keep the screen on. Heart rate only, no HRV.

How to switch on

1. On the watch open the Play Store (app list › Play Store), search for “Heart for Bluetooth” (by Lukas the Coder) and install it. It can only be installed from the watch, not from the phone.
2. On the phone open Galaxy Wearable › Watch settings › Apps › Heart for Bluetooth › App info and turn on “Allow background activity”. Otherwise broadcasting stops when the screen goes off.
3. On the watch start Heart for Bluetooth and allow sensor and Bluetooth access. The current heart rate appears on the screen, the watch now broadcasts like a chest strap.
4. Keep the app on the screen (or turn on its “Always on” mode). Do not open anything else on the watch while the session lasts.
5. In our app choose Galaxy Watch and connect. The watch may show up under its own name or as “HR”. The first heart rate sensor found is used.

Models: Galaxy Watch4 / Watch5 / Watch FE, Galaxy Watch6 / Watch7 / Watch8 / Watch Ultra, Galaxy Watch Active / Active2 / Watch (2018, Tizen)

Pixel Watch 2 and newer on Wear OS 6: swipe down › Connected Fitness › Connect. Other Wear OS watches (OnePlus, TicWatch, Fossil, Xiaomi): install the Heart for Bluetooth app on the watch and keep the screen on. Heart rate only, no HRV.

How to switch on

1. Pixel Watch 2/3/4/5: swipe down from the watch face, tap Connected Fitness › Connect (first time allow “Wider device access”). The watch broadcasts until you close it. Max 2 receivers.
2. Other Wear OS watches: open the Play Store on the watch, install “Heart for Bluetooth” and start it. Broadcasting runs while the app is on the screen; allow it to run in the background in the watch settings.
3. In our app choose Wear OS watch and connect; the first heart rate sensor found is used.

Models: Google Pixel Watch 2 / 3 / 4 / 5, Fitbit Charge 6, OnePlus Watch 2 / 3, TicWatch, Fossil Gen 5 / 6, Xiaomi Watch 2

Our watch app (Galaxy Watch4 and newer). Tap Start on the watch, it broadcasts like a chest strap even with the screen off. On Galaxy Watch it gives heart rate and RR intervals (HRV), on other Wear OS watches heart rate only.

How to switch on

1. Install the FS Pulse Watch app on the watch (for now a test build from your session guide, later the Play Store on the watch).
2. On first start allow heart rate, Bluetooth and notification access.
3. Tap Start. The screen shows the heart rate and the “Broadcasting” status. The screen may go off, the app keeps running (icon at the bottom of the watch face).
4. In our app choose Galaxy Watch (FairStream app) and connect; the watch shows up as “FS Pulse Watch”. After the session tap Stop on the watch.

Models: Galaxy Watch4 / 5 / 6 / 7 / 8 / Ultra / FE, Other Wear OS 11+ watches (Pixel Watch, OnePlus, TicWatch)

The FairStream Pulse app opens on the watch and starts measuring (heart rate about every 5 seconds, no HRV). The watch must be paired with this iPhone.

How to switch on

1. In the Watch app on the iPhone make sure FairStream Pulse is installed on the watch too (My Watch, Available Apps).
2. On first launch allow access to Heart Rate and Workouts in the Health app on the watch.
3. Pick Apple Watch on the phone. The watch app opens by itself; if not, open it and tap Start.
4. Wear the watch snugly; the measurement runs as a Mind and Body workout and ends with Stop or when the session ends.

Models: Apple Watch Series 4 and newer, Apple Watch SE (1st to 3rd gen), Apple Watch Ultra / Ultra 2 / Ultra 3, Apple Watch Series 12 / Ultra 4

On the watch turn on Settings › HR Data Broadcasts. If the item is missing from Settings, the watch does not support broadcasting. Heart rate only, no HRV.

How to switch on

1. Press the upper button on the watch to open the app list. Tap Settings.
2. Tap "HR Data Broadcasts". If there is no such item, your watch cannot broadcast heart rate.
3. Read the statement and confirm with the tick. The watch starts measuring and broadcasting. Older system versions then offer a workout: pick e.g. Walking and start it, otherwise nothing is broadcast.
4. Tap Connect in the app. The watch shows up as "HUAWEI ...". Keep the watch on the wrist; the screen may go off.
5. After the session press the side button on the watch and tap the tick to stop broadcasting (saves battery).
6. Watch 5 and Watch Ultimate 2 broadcast only in Battery saver mode. Switch the watch to it first.

Models: Watch GT 3 / GT 3 Pro, Watch GT 4, Watch GT 5 / GT 5 Pro, Watch 4 / 4 Pro, Watch 5, Watch Ultimate / Ultimate 2, Watch Fit 3, Watch Fit 4 / 4 Pro, Band 8 / 9 / 10, Watch Fit 2, Watch 3 / 3 Pro, Watch GT 2 / GT 2e / GT 2 Pro, Watch Fit / Fit mini (2020), Band 7 a starší

Honor Band 10 can broadcast heart rate over Bluetooth (switched on in the band Settings). Older Honor Bands and Honor Watch models have no broadcast in their manuals. Heart rate only, no HRV.

How to switch on

1. Open Settings on the band and find the Bluetooth heart rate broadcast item (Heart Rate Broadcast). Turn it on.
2. Tap Connect in the app. The band shows up as "HONOR ...".
3. After the session switch broadcasting off to save battery.

Models: Band 10, Band 9 a starší, Watch 4 / 5 / GS 3 / GS 5

In the Zepp app turn on Health Monitoring › Heart Rate Push for the watch. Needs Zepp OS 3 or newer (GTR 4, GTS 4, Balance, Active, T-Rex 3, Bip 6). Some models need a running workout. Heart rate only, no HRV.

How to switch on

1. Update the watch in the Zepp app (Profile › your watch › Update). Broadcasting needs Zepp OS 3; watches on Zepp OS 2 or older (GTR 3, GTS 3, Bip 5) cannot do it.
2. In the Zepp app open Profile › your watch › Health Monitoring and turn on "Heart Rate Push".
3. If the watch does not show up in our app, start a workout on it (e.g. Walking or Free training). Some models broadcast only during a workout.
4. Tap Connect in the app. The watch shows up as "Amazfit ...".
5. After the session end the workout and switch Heart Rate Push off to save battery.

Models: GTR 4 / GTS 4, Balance / Balance 2, Active / Active 2, T-Rex Ultra / T-Rex 3, Bip 6, T-Rex 3 Pro, Balance 3, Active 3, Cheetah 2, T-Rex Ultra 2, Bip Max, GTR 3 / GTR 3 Pro / GTS 3, GTR Mini, Bip 5, Cheetah, Bip 3, Bip U, GTS 2, GTR 2 a starší

Screenless band. In the Zepp app turn on Helio Strap › Health Monitoring › Heart Rate Push (newer firmware ships with it on). Heart rate only, no HRV.

How to switch on

1. In the Zepp app open Profile › Amazfit Helio Strap › Health Monitoring and check that "Heart Rate Push" is on.
2. Wear the band on the wrist or with the holder on the upper arm (more stable readings on the arm).
3. Tap Connect in the app. The band shows up as "Amazfit Helio Strap".

Models: Helio Strap, Helio Ring

Smart Band 10: on the band Settings › Share HR › Turn on. Watch S4 / S5: turn on Bluetooth heart rate broadcasting in the watch settings. Smart Band 7 to 9 and Mi Band cannot broadcast. Heart rate only, no HRV.

How to switch on

1. Smart Band 10: swipe up on the screen to open the app list. Tap Settings › "Share HR" › Turn on.
2. Watch S4 / S5: in the watch settings turn on "Bluetooth heart rate broadcasting"; on some versions the switch sits in the cycling workout settings.
3. Bluetooth on the phone must be on. Tap Connect in the app; the device shows up as "Xiaomi ...".
4. After the session switch broadcasting off to save battery.

Models: Smart Band 10, Watch S4, Watch S5, Smart Band 9 / 9 Pro / 9 Active, Smart Band 8 / 8 Pro / 8 Active, Smart Band 7 / 7 Pro, Mi Band 3 až 6, Redmi Watch 3 / 4 / 5, Watch S1 / S3, Watch 2, Watch 2 Pro (Wear OS)

On the watch hold the BACK button to open the Toolbox and choose Broadcast HR. The watch allows only one Bluetooth link while broadcasting, so first remove it from the COROS app and from the phone Bluetooth list. Heart rate only, no HRV.

How to switch on

1. Free the watch Bluetooth: in the COROS app open Profile and remove the watch, then in the phone Bluetooth settings tap the watch and choose Forget. COROS allows only one Bluetooth link while broadcasting heart rate. After the session add the watch back to the COROS app.
2. If a chest strap or another sensor is paired to the watch, broadcasting cannot start. Disconnect it: System › Accessories › Added List.
3. On the watch face hold the BACK button (lower button) for about two seconds to open the Toolbox. Pick Broadcast HR and confirm.
4. Leave the watch on the Broadcast HR screen and tap Connect in this app. The watch shows up as “COROS …”.
5. Keep the watch on the broadcast screen for the whole session. You may also start a workout; broadcasting continues during it.

Models: PACE 2 / PACE 3 / PACE 4 / PACE Pro, APEX 2 / APEX 2 Pro / APEX 4, APEX Pro / APEX 42 / APEX 46, VERTIX / VERTIX 2 / VERTIX 2S, NOMAD, DURA

Put the band on your upper arm; it switches on by itself and broadcasts to up to three devices at once. No button, no settings. Heart rate only, no HRV.

How to switch on

1. Put the band on the upper arm between biceps and shoulder, sensor snug against the skin. Wear detection switches it on and into pairing mode (green LEDs flash on the back).
2. Tap Connect in this app. The band shows up as “COROS …”. You do not need to close the COROS app; the band does not send data to it.
3. If it is not found or keeps dropping: the band handles at most three links, disconnect it from your watch or bike computer. If that does not help, charge it for two hours and retry.

Models: COROS Heart Rate Monitor

Heart rate broadcast exists on Suunto Race, Race S, Race 2 and Vertical 2 since the April 2026 update. Pick a sport, turn on heart rate broadcast on the start screen and stay there; no need to start the exercise. Heart rate only, no HRV.

How to switch on

1. Update the watch through the Suunto app to software 2.53.42 or newer (April 2026). Older software has no heart rate broadcast.
2. On the watch open Exercise (upper button or crown) and pick any sport. Stay on the start screen with the icons above the Start button.
3. Turn the crown or swipe up into the sport options and switch on heart rate broadcast (Broadcast heart rate). Since software 2.56.18 the watch remembers the choice for that sport.
4. Tap Connect in this app. The watch shows up as “Suunto …”. You do not have to start the exercise, but do not leave the start screen or broadcasting stops.
5. If you use a Suunto chest belt, keep it connected to the watch; the watch then relays its heart rate.

Models: Race / Race S, Race 2 / Vertical 2, Vertical (2023), 9 Peak Pro / 9 Peak / 5 Peak / Ocean / Run / Run 2

Moisten the electrodes, put the belt on and snap the sensor in; it transmits by itself. Gives heart rate and beat-to-beat intervals, so HRV works too. The belt holds one link only, disconnect it from your watch.

How to switch on

1. Wet the belt electrodes, fasten it around your chest with the Suunto logo upright and snap the sensor on with both studs.
2. The belt transmits as soon as it is worn. It keeps one active link only: stop any exercise on your Suunto watch and close the Suunto or Sports Tracker app, otherwise this app cannot find it.
3. Tap Connect in this app. The sensor shows up as “Suunto …”. Stay at least 10 m away from other heart rate sensors while searching.
4. After the session unsnap the sensor from the belt so it switches off and saves the battery.

Models: Smart Heart Rate Belt / Smart Sensor, Smart Heart Rate Belt 2 (SHRM2)

On Charge 6 swipe down from the clock face and tap HR on Equipment, then tap Connect in this app and confirm sharing on the tracker. Fitbit Air: Google Health app › Connections › Share heart rate. Older Fitbits do not broadcast. Heart rate only, no HRV.

How to switch on

1. Charge 6: swipe down from the clock face and tap HR on Equipment. The tracker broadcasts only for a short while, so continue with the next step right away.
2. Tap Connect in this app. The tracker shows up as “Charge 6”. If the phone asks to pair, accept it; without pairing Fitbit does not send heart rate.
3. The tracker asks whether to share your heart rate: tap Share and Start. Alternative: start an exercise on the tracker and connect within the first two minutes.
4. Fitbit Air: open the Google Health app, top left Connections › your device › Share heart rate › Get started, then tap Connect in this app.
5. The tracker keeps one link at a time. If it does not connect, disconnect it from any other machine or app, toggle the phone Bluetooth and retry.

Models: Charge 6, Google Fitbit Air, Charge 5, Sense 2, Versa 4, Inspire 3, Luxe

On the watch swipe down from the clock face and tap Connected Fitness › Connect; for phone apps turn on Allow more devices › Extended pairing. Pixel Watch 2 needs Wear OS 6 (October 2025). Heart rate only, no HRV.

How to switch on

1. On the watch swipe down from the clock face into quick settings and tap Connected Fitness. If the tile is missing, open Settings › Connectivity › Share Heart Rate.
2. Scroll down to Allow more devices and turn on Extended pairing. Phone apps can then find the watch without the standard pairing flow. Go back and tap Connect.
3. Tap Connect in this app. The watch shows up as “Google Pixel Watch …”. If the watch asks you to confirm the device, accept it.
4. After the session switch Extended pairing off (the watch is visible to more devices in that mode) and end sharing in Connected Fitness; it saves battery.

Models: Pixel Watch 2, Pixel Watch 3 / 4 / 5, Pixel Watch (2022)

In the WHOOP app open Device Settings and turn on HR Broadcast; only then can the band be connected. It broadcasts to one device at a time and the toggle switches itself off after updates. Heart rate only, no HRV.

How to switch on

1. Wear the band and keep the phone with the WHOOP app nearby; the band must be connected in the app, otherwise the toggle does not take effect.
2. In the WHOOP app tap the device status bar at the bottom of the home screen (or More › Device Settings) and turn on HR Broadcast.
3. Tap Connect in this app. The band shows up as “WHOOP …”. Once connected the WHOOP app no longer has to be nearby, but WHOOP sends heart rate to one receiver only.
4. If it is not found: toggle HR Broadcast off and on in the WHOOP app and toggle the phone Bluetooth. The switch turns off after app or firmware updates, check it before each session.

Models: WHOOP 4.0, WHOOP 5.0 / WHOOP MG

TICKR (2020 on), TICKR X and TRACKR send heart rate and beat intervals (HRV). The TICKR FIT armband sends heart rate only. Up to 3 Bluetooth connections at once.

How to switch on

1. LEDs: red blinks with every heartbeat, blue slow = strap awake and waiting, blue fast = connected. LEDs go dark after about 30 seconds, the strap keeps transmitting.
2. TRACKR charges with a magnetic cable (about 100 hours per charge), TICKR uses a CR2032 coin cell (about 500 hours).

Models: TRACKR HEART RATE, TICKR (2020, gen 2), TICKR X (2020, gen 2), TICKR / TICKR X / TICKR RUN (gen 1), TICKR FIT (armband)

Cheap ECG straps. The maker lists HRV support for H6, H808S and H9Z; independent RR quality tests exist only for the HW9 armband. If the app shows HRV, the strap sends RR.

How to switch on

1. H808S: green flash and two beeps = strap senses you and measures, blue blinking = connected to an app. The H6 has no LED, you only see it in the app.
2. If the strap does not show up, replace the CR2032 battery (the maker lists this as the first step) and check it is not connected to a watch or another app.

Models: H6, H808S, H9Z

Optical armband. The HW9 sends beat intervals and is usable for HRV at rest (verified by HRV4Training), the HW807 claims it, the HW706 has no HRV.

How to switch on

1. Shows up as "HW9" or "HW807" in the app. The HW9 holds two Bluetooth connections, the HW807 one.

Models: HW9, HW807, HW706

The cheapest ECG straps. The maker lists Elite HRV compatibility but only says to verify RR intervals in your app. One Bluetooth connection at a time.

How to switch on

1. Magene holds only one Bluetooth connection: connect a watch or bike computer over ANT+, or switch them off for the session.
2. If the strap does not show up: close and reopen the app, restart the phone, check the electrodes are wet (maker procedure).

Models: H64 (Mover), H603

Optical armband. The Rhythm24 sends beat intervals only in HRV mode, switched on in the Rhythm Sync app (no longer distributed). For the Rhythm+ 2.0 the maker promises RR, HRV4Training does not recommend it for HRV.

How to switch on

1. Rhythm24: install the Scosche Rhythm Sync app, connect the armband and in "Set Mode" choose Heart Rate Variability. Then close Rhythm Sync and connect the armband here.
2. Connect over Bluetooth, not ANT+. It shows up as "Rhythm24" or "Rhythm+" in the list.

Models: Rhythm24, Rhythm+ 2.0, Rhythm+ (gen 1)

Any strap or armband with the standard Bluetooth heart rate profile (Movesense, 4iiii Viiiiva, Suunto, Decathlon, Sigma, Zephyr and others). The app takes the first sensor found. Whether it sends HRV shows after connecting.

How to switch on

1. Keep only one heart rate sensor in range (or switch off a watch broadcasting heart rate), the app connects to the first one it finds.

Models: Movesense HR2 / HR+ / MD, 4iiii Viiiiva, Suunto Smart Sensor / Smart Heart Rate Belt, Zephyr HxM Smart, Decathlon Kalenji Dual / HRB 500, Kinetic inRide H1, Frontier X2 (ECG), Polar OH1 / Verity Sense (armband)