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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 this exact model to Bloom and captured live heart rate.

  • Garmin

    vívosmart 4

    Connects automatically through Bloom’s dedicated Garmin support.

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

    H808S · HW9

  • 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.

  • Xiaomi

    Smart Band 10

    Open Settings → Share HR on the band before connecting.

Need an affordable device?

Try what you already own first. If you are buying something for Bloom, good options start around $35. These picks separate price, wearing style, and compatibility confidence.

  1. COOSPO H808S

    Good bet · chest strap · about $35 new

    The lowest-cost new option here. It shares live heart rate over Bluetooth, though Bloom has not tested this exact model directly.

    Buy from COOSPO Search Amazon

  2. Xiaomi Smart Band 10

    Promising · wrist band · about $50 new

    The strongest wrist option we found under $60. Xiaomi documents live Bluetooth heart-rate sharing; a Bloom hardware test is still pending.

    Search Amazon

  3. Amazfit Helio Strap

    Good bet · screen-free wrist band · price varies

    A comfortable screen-free option with manufacturer-documented Heart Rate Push. Enable it in the Zepp app before connecting to Bloom.

    Buy from Amazfit Search Amazon

  4. Garmin vívosmart 4

    Tested with Bloom · wrist band · used prices vary

    The only wrist model Bloom has tested directly. It is discontinued, so look for a seller with returns and confirm the charger is included.

    Search eBay Search Amazon

  5. Polar H9

    Good bet · chest strap · about $70 new

    A reliable brand-name choice, but not the budget pick. For Bloom, the H9 provides the connection you need without paying extra for the H10.

    Search eBay Search Amazon

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

Open Bloom on the screen that suits you.

Bloom can pair from a compatible browser on a phone, tablet, or 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.

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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