Life & fun · alternatives · 2026

24 alternatives to Function101 HeartSync for Apple Watch

Connect Apple Watch heart rate to fitness gear

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Function101 HeartSync for Apple Watch launched in 2021; newer entries below may have overtaken it.

1. 1
   Apple Watch Series 3▲384

   Apple's newest internet-connected smartwatch

   2017 · apple.com · its alternatives →

2. 2
   Rhythm▲168

   Hear, see and feel your own heartbeat

   2025 · apps.apple.com · its alternatives →

3. 3
   CardioBot▲81

   Your Apple Watch measures your heart rate every 4 minutes

   2020 · its alternatives →

4. 4
   CardioBot▲78

   Heart Rate Tracker

   2020 · apps.apple.com · its alternatives →

5. 5
   Cardiogram▲76

   Continous heart rate for Android Wear and Apple Watch

   2015 · cardiogr.am · its alternatives →

6. 6
   Pebble 2, Time 2 + All-New Pebble Core▲426

   Two new heart-rate enabled smartwatches + 3G wearable

   2016 · kickstarter.com · its alternatives →

7. 7
   GlowPulse▲109

   Your Mac's camera is now a heart-rate sensor

   Jun 2026 · glowpulse.cc · its alternatives →

8. 8
   Cardiogram for Apple Watch▲114

   What's your heart telling you?

   2015 · cardiogr.am · its alternatives →

9. 9CH
   Continous Heart Rate for Android Wear and Apple Watch▲62

   2015 · cardiogr.am · its alternatives →

10. 10
    Gyroscope Watch App▲194

    Transform your Apple Watch into the ultimate health tracker

    2019 · its alternatives →

11. 11
    HyNote for Apple Watch▲315

    Live Recording with Apple Watch

    2025 · apps.apple.com · its alternatives →

12. 12
    FITIV Pulse▲65

    Taking heart rate data and fitness tracking to a new level.

    2019 · fitiv.com · its alternatives →

13. 13
    Heart Rate Streaming for Apps▲144

    API to easily stream real-time health data from wearables

    2023 · tryterra.co · its alternatives →

14. 14
    CardioBot▲11

    Heart Rate Tracker for iOS and WatchOS

    2016 · its alternatives →

15. 15
    Pacemaker▲90

    Instantly create a music mix on your Apple Watch

    2015 · pacemaker.net · its alternatives →

16. 16
    Heart Watch▲83

    View heart rate data captured by your Apple Watch

    2015 · heartwatch.tantsissa.com · its alternatives →

17. 17
    HeartBLE for Apple Watch▲3

    Turn Apple Watch into Bluetooth haert rate monitor

    Apr 2026 · apps.apple.com · its alternatives →

18. 18
    RocketBody▲250

    ECG Workouts

    2018 · gorocketbody.com · its alternatives →

19. 19
    Heartwitch▲14

    Live Stream Your Heart Rate

    2019 · heartwitch.app · its alternatives →

20. 20
    Beep Test Watch▲64

    Fastest way to determine cardio fitness on Apple watch

    2021 · beeptestwatch.com · its alternatives →

21. 21
    Rep Counting Intervals by BodBot▲71

    Counts reps, measures heart rate, and adapts your workout

    2016 · bodbot.com · its alternatives →

22. 22
    Hummingbird▲74

    Tailor workout sessions with real-time trainee metrics

    2021 · its alternatives →

23. 23
    AURA Strap for Apple Watch▲86

    Measure hydration levels & body composition on your Watch

    2020 · promo.auradevices.io · its alternatives →

24. 24
    Runo 2.0▲132

    I built Runo after years of inconsistent marathon training. GPS watches tell you your pace AFTER it's too late. So I made a simple metronome that plays a beat at your target cadence (steps per minute). New in 2.0: Apple Watch haptics (run to the beat without headphones), Strava sync, and social features. 4.7 on App Store, 10k+ runners. Would love feedback from the HN community.

    Jan 2026 · runoapp.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →