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Your device is worth a try.

Heart-rate capture is optional and still experimental. If your watch or sensor can share live heart rate over Bluetooth, there is a good chance Bloom can connect to it.

Try Bloom

Start with what you have.

Not on the list? It may still work. Trying is quick, and you will know as soon as Bloom finds a live signal.

Bloom listens for the standard Bluetooth Heart Rate service used by many chest straps, armbands, and watches. It also includes a dedicated connection for the Garmin vívosmart 4.

Some watches need Heart Rate Broadcast, Heart Rate Push, Share HR, or a workout turned on first. Firmware can change this behavior, which is why the list below is a starting point—not a closed compatibility list.

A few strong places to start.

This list mirrors the devices Bloom knows how to guide you through in the product. The labels separate direct Bloom testing from manufacturer-documented broadcasting and more experimental possibilities.

If you already own something else, try that before buying anything.

Tested with Bloom

We have connected these exact models to Bloom and captured live heart rate.

  • Xiaomi

    Bloom verified

    Smart Band 10

    Open Settings → Share HR on the band before connecting.

  • Garmin

    Bloom verified

    vívosmart 4

    Connects automatically through Bloom’s dedicated Garmin support.

  • COOSPO

    Bloom verified

    H808S · HW706

    Most other COOSPO Bluetooth heart-rate models are also good bets.

Good bets

Their makers document live Bluetooth heart-rate sharing. Bloom supports that standard signal, though we have not tested every model and firmware combination.

  • Polar

    H9 · H10 · Verity Sense

  • Garmin

    HRM 200 · HRM 600 · HRM-Pro Plus · HRM-Fit · Forerunner 970 · fēnix 8 · Venu 4 · vívoactive 6

  • Wahoo

    TRACKR HEART RATE · TICKR FIT

  • COROS

    Heart Rate Monitor · PACE 3 · PACE Pro · APEX 2 · VERTIX 2S

  • WHOOP

    4.0 · 5.0 · MG

  • Google Fitbit

    Charge 6 · Fitbit Air

  • Google

    Pixel Watch 2 · Pixel Watch 3 · Pixel Watch 4

  • Amazfit

    Helio Strap · GTR 4

    Turn on Heart Rate Push before connecting.

  • COOSPO

    Most Bluetooth heart-rate models · HW9

    H808S and HW706 are Bloom verified; other exact models and firmware can vary.

  • Scosche

    Rhythm24

Especially worth a try

Bloom has support for the signal these devices may expose, but firmware and setup can change whether the browser sees it.

  • Garmin

    vívosmart 3 · vívosmart 5

    Bloom will try its dedicated Garmin connection.

  • Amazfit

    T-Rex 3

    Turn on Heart Rate Push and try starting a workout if needed.

  • Apple

    Apple Watch with HeartCast

    Worth a try: some Bloom users report success, but Bloom has not verified this setup.See Apple Watch setup

Need an affordable device?

Try what you already own first. If you are buying something for Bloom, good options start around $35. Every recommendation below is Bloom verified.

  1. Xiaomi Smart Band 10

    Bloom verifiedRecommended · wrist band · about $50 new

    An affordable wrist band that we have tested directly for live heart-rate capture.

    Search Amazon

  2. COOSPO H808S

    Bloom verifiedRecommended · chest strap · about $35 new

    A low-cost chest strap that we have tested directly with Bloom. Put it on to wake it before connecting.

    Buy from COOSPO View on Amazon

  3. COOSPO HW706

    Bloom verifiedRecommended · armband · about $35 new

    A rechargeable, screen-free arm band that we have tested directly with Bloom. Press its button to wake it before connecting.

    Buy from COOSPO Search Amazon

  4. Garmin vívosmart 4

    Bloom verifiedRecommended · wrist band · used prices vary

    A directly tested option with Bloom’s dedicated Garmin connection. It is discontinued, so look for a seller with returns and confirm the charger is included.

    Search eBay Search Amazon

Prices checked August 2026. Marketplace prices, condition, and sellers change often. Bloom does not receive a commission from these links.

Apple Watch is worth a try.

Some Bloom users have connected an Apple Watch through HeartCast. This path is experimental rather than Bloom verified, and reliability can vary.

Get HeartCast from the App Store
  1. 1

    Open HeartCast

    Install HeartCast on your Apple Watch, then open it there.

  2. 2

    Start broadcasting

    Press Start on your Apple Watch to begin a workout and Bluetooth broadcast. Keep HeartCast open on the watch while connecting.

  3. 3

    Choose HeartCast in Bloom

    Use Bloom in Chrome or Edge on a Mac or Windows computer, or Chrome on Android, and select HeartCast from the browser’s Bluetooth picker.

Open Bloom on the screen that suits you.

Bloom can pair from a compatible browser on a phone or tablet, or on a Mac or Windows computer. Its browser-based design does not mean you need a laptop.

Your browser will ask you to choose and approve the device. Bloom cannot connect without that permission. If its device picker does not appear, try a browser that supports Web Bluetooth on your device.

  1. 1

    Bring it close

    Make sure Bluetooth is on and your device is charged and nearby.

  2. 2

    Open Bloom

    Choose “Connect your heart-rate device” and ask Bloom to look nearby.

  3. 3

    Choose your device

    Select its name in the browser’s Bluetooth picker and let Bloom connect.

Choose your screen before you pair.

Bloom works in modern browsers for logging sessions, viewing history, and exploring your patterns. The optional Bluetooth heart-rate connection needs a browser that supports Web Bluetooth.

For the smoothest setup, use Chrome or Edge on a Mac or Windows computer, or Chrome on Android.

Mac, Windows, and ChromeOS

Heart rate supported

Use a current version of Chrome or Edge. Safari on Mac and Firefox do not currently provide the Bluetooth connection Bloom needs.

Android

Heart rate supported

Use a current version of Chrome. Your phone will ask you to choose and approve the nearby heart-rate device.

iPhone and iPad

Heart rate not supported yet

You can still use Bloom for sessions, history, and insights. For Bluetooth heart rate today, use a Mac or Windows computer with Chrome or Edge, or an Android phone with Chrome. There is a path forward being explored.

Browser capabilities change over time. Bloom checks your browser before pairing and will let you know when the Bluetooth connection is unavailable.

The easiest answer is your own device.

Open Bloom and try connecting it. If it does not appear, turn on its heart-rate sharing or workout mode and try once more.

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