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Quiz result

Your result: read Bluetooth sensors directly

Your answers point to reading the sensors themselves over Bluetooth Low Energy, using the Bluetooth SIG's standard GATT profiles. It is a starting point from the eight-question quiz, not a verdict on any product.

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When this fits (our judgment)

  • Your users have heart-rate straps, power meters, smart trainers, rowers or treadmills.
  • You want live readings during a session, not a summary hours later.
  • You want no vendor account or per-user fee between you and the device.

What to check first (our judgment)

  • You own pairing, reconnection and every device's quirks.
  • Summaries over days still need a health store or a cloud API next to the live readings.

The options, and what this site’s sources say

This site reads the Bluetooth SIG's public repository (512 characteristic UUIDs and 278 structure files at commit 408f4a0, 2026-10-14). The free tools to test a device against it:

  • Bluetooth heart-rate lab

    • Connect a BLE heart-rate strap in the browser: every 0x2A37 byte decoded, and whether it sends the RR intervals HRV needs.

    From the tool, where each statement is sourced and dated.

  • FTMS lab

    • Connect a treadmill, indoor bike, rower or cross trainer over Web Bluetooth, or paste hex: every FTMS flag bit and field decoded against the SIG structure.

    From the tool, where each statement is sourced and dated.

  • Cycling power and cadence lab

    • Cycling Power (0x2A63) and CSC (0x2A5B) decoded, with cadence and speed computed from cumulative revolutions and event times, live or pasted.

    From the tool, where each statement is sourced and dated.

  • BLE GATT explorer

    • Connect any Bluetooth LE device: services and characteristics by SIG name, read or notify, values decoded where the SIG defines a structure.

    From the tool, where each statement is sourced and dated.

Read next

If one answer were different

  • HealthKit and Health Connect — Your answers point to the two platform health stores, one per app: HealthKit on iPhone and Health Connect on Android.
  • The device makers' own APIs — Your answers point to integrating each device maker's own cloud API, one OAuth integration per brand.
  • Camera pose tracking — Your answers point to camera-based pose tracking: reps, form and joint angles come from the camera, not a wearable.

Take the quizOther kinds of fitness API: the picker

A free quiz from AIFitnessAPI. Nobody pays for placement here; the site is funded by KinesteX, and any page featuring it says so up front.