Know exactly what your sensors add to every workout.

Look up a device to see what Watchletic can record on Apple Watch and Wear OS, from heart rate and DFA-a1 to Stryd running dynamics, CORE temperature data, and cycling power.

Both platforms: Heart rate, Stryd, CORE, running pods, treadmills, and ENGO
Apple Watch native: Cycling power, speed, and cadence sensors
Deep metrics: RR, HRV, DFA-a1, rich Stryd dynamics, and heat strain

Compatible watches.

Watchletic supports Apple Watch models running watchOS 9 or later and Wear OS watches running Wear OS 5 or later. Keep your watch on its latest available system version. A Wear OS model not listed here should also work when it meets that OS requirement.

Apple

Apple Watch

watchOS 9 or later

Apple Watch Series 4
Apple Watch Series 5
Apple Watch Series 6
Apple Watch Series 7
Apple Watch Series 8
Apple Watch Series 9
Apple Watch Series 10
Apple Watch Series 11
Latest
Apple Watch SE (1st generation)
Apple Watch SE (2nd generation)
Apple Watch SE 3
Latest
Apple Watch Ultra
Apple Watch Ultra 2
Apple Watch Ultra 3
Latest

All case sizes, materials, Nike and Hermès editions, and GPS or cellular variants are included. Series 3 and older cannot run the minimum watchOS version.

Sources: Apple model history, Apple Watch compatibility

Google

Wear OS

Wear OS 5 or later

Google Pixel Watch
Google Pixel Watch 2
Google Pixel Watch 3
Google Pixel Watch 4
Latest

Both Wi-Fi and LTE variants are included. Install the latest available system update before installing Watchletic.

Sources: Pixel Watch generations, Google update information

Samsung

Wear OS

Wear OS 5 or later

Samsung Galaxy Watch4
Samsung Galaxy Watch4 Classic
Samsung Galaxy Watch5
Samsung Galaxy Watch5 Pro
Samsung Galaxy Watch6
Samsung Galaxy Watch6 Classic
Samsung Galaxy Watch FE
Samsung Galaxy Watch7
Samsung Galaxy Watch Ultra2024 and 2025
Samsung Galaxy Watch8
Samsung Galaxy Watch8 Classic
Samsung Galaxy Watch9Available August 2026
Latest
Samsung Galaxy Watch Ultra2Available August 2026
Latest

All case sizes and Bluetooth or LTE variants are included. The original Galaxy Watch, Watch Active, Active2, and Watch3 use Tizen and are not compatible.

Sources: Galaxy Watch model history, Samsung 2026 models

OnePlus

Wear OS

Wear OS 5 or later

OnePlus Watch 2Wear OS 5 update required
OnePlus Watch 2RWear OS 5 update required
OnePlus Watch 3
OnePlus Watch 3 43mm
OnePlus Watch 4
Latest

The original OnePlus Watch and Watch Lite do not run Wear OS. Update Watch 2 or Watch 2R before looking for Watchletic in Google Play.

Sources: OnePlus Watch 4, OnePlus Watch 3

OPPO

Wear OS

Wear OS 5 or later

OPPO Watch X2
OPPO Watch X2 Mini
OPPO Watch X3
Latest

Availability varies by country. Older OPPO watches are only compatible if their current system version is Wear OS 5 or later.

Sources: OPPO Watch X3, OPPO Watch X2 specifications

Your device may work even if it is not listed.

Watchletic supports Bluetooth device standards, not only the named models below. Any heart-rate monitor that exposes the standard Bluetooth Low Energy Heart Rate Service is expected to work on Apple Watch and Wear OS. The named models are tested or documented examples, not a complete compatibility list. Exact fields still depend on what each model and firmware transmit.

IntegratedPurpose-built support inside Watchletic
Standard BLEExpected through a Bluetooth standard Watchletic supports
via watchOSPair in Apple Watch Settings; Watchletic receives the data
Not yetNot currently supported on this platform

Bluetooth device	Data you can record	Apple Watch	Wear OS
Purpose-built integrations
Stryd sensor / Stryd Duo	Power, speed, cadence, distance, stride length, ground contact time, vertical oscillation, form power, air power, leg spring stiffness, elevation, impact, temperature, humidity, and Stryd Duo balance metricsStryd Duo also adds ground-contact-time, impact-loading-rate, leg-spring-stiffness, and vertical-oscillation balance plus vertical ratio.	Integrated	Integrated
CORE body temperature sensor	Core body temperature, skin temperature, heat strain index, and heart rate when supplied by CORE	Integrated	Integrated
FTMS / RSC treadmill or NPE Runn	Speed, distance, and incline; cadence and stride length when supplied by the device	Integrated	Integrated
ActiveLook / ENGO glasses	Live Watchletic workout fields in the heads-up display	Integrated	Integrated
Standard Bluetooth device families
Any standard BLE heart-rate monitor	Heart rate; RR intervals, HRV (RMSSD), DFA-a1, and artifact rate when RR data is broadcastHeart rate works through the Bluetooth Heart Rate Service. RR-derived metrics require the monitor to include RR intervals in that service.	Standard BLE	Standard BLE
Any standard BLE running speed/cadence pod	Running speed and cadence; distance and stride length when supplied by the podWatchletic discovers the standard Bluetooth Running Speed and Cadence service directly on both Apple Watch and Wear OS.	Standard BLE	Standard BLE
Any compatible BLE cycling power meter	Cycling power and cadence when supplied by the meterPair under Settings → Bluetooth → Health Devices on Apple Watch before starting a cycling workout in Watchletic.	via watchOS	Not yet
Any compatible BLE cycling speed/cadence sensor	Cycling speed, distance, and/or cadencePair under Settings → Bluetooth → Health Devices on Apple Watch.	via watchOS	Not yet
Tested or documented heart-rate monitors
Polar H10	Heart rate, RR intervals, HRV (RMSSD), DFA-a1, and artifact ratePolar documents heart rate and RR intervals over Bluetooth; Watchletic derives HRV and DFA-a1 from those RR intervals.	Standard BLE	Standard BLE
Wahoo TICKR	Heart rate, RR intervals, HRV (RMSSD), DFA-a1, and artifact rate	Standard BLE	Standard BLE
Suunto Smart Sensor	Heart rate, RR intervals, HRV (RMSSD), DFA-a1, and artifact rate	Standard BLE	Standard BLE
Polar H7	Heart rate, RR intervals, HRV (RMSSD), DFA-a1, and artifact rate	Standard BLE	Standard BLE
Polar OH1	Heart rate onlyThe optical sensor broadcasts heart rate, but does not transmit RR intervals to third-party apps.	Standard BLE	Standard BLE
Polar Verity Sense	Heart rate onlyThe optical sensor broadcasts heart rate, but does not transmit RR intervals to third-party apps.	Standard BLE	Standard BLE
Garmin HRM-Dual	Heart rate, RR intervals, HRV (RMSSD), DFA-a1, and artifact rate	Standard BLE	Standard BLE
Garmin HRM-Pro / Pro Plus	Heart rate, RR intervals, HRV (RMSSD), DFA-a1, and artifact rateWatchletic receives heart rate and RR intervals, not Garmin running dynamics or stored workout data.	Standard BLE	Standard BLE
COROS Heart Rate Monitor	Heart rate onlyThe optical sensor does not supply RR intervals, so HRV, DFA-a1, and artifact rate are not available.	Standard BLE	Standard BLE
CooSpo H6	Heart rate, RR intervals, HRV (RMSSD), DFA-a1, and artifact rateCooSpo lists HRV support for the H6. Watchletic derives HRV and DFA-a1 from its RR intervals.	Standard BLE	Standard BLE
SunDING SD-520 heart-rate monitor	Heart rate, RR intervals, HRV (RMSSD), DFA-a1, and artifact rateRR-based recording has been documented for the SD-520. Other SunDING models may differ.	Standard BLE	Standard BLE
Runtastic Bluetooth heart-rate monitor	Heart rate onlyHeart rate is confirmed. RR interval output from this discontinued monitor is not documented.	Standard BLE	Standard BLE
Jabra Sport Pulse	Heart rate onlyThis is an optical sensor in the ear. Only heart-rate output is documented.	Standard BLE	Standard BLE
Bose SoundSport Pulse	Heart rate onlyThis is an optical sensor in the ear. Only heart-rate output is documented.	Standard BLE	Standard BLE
Wahoo TICKR FIT	Heart rate onlyThe optical armband does not transmit RR intervals to third-party apps.	Standard BLE	Standard BLE
Myzone MZ-3	Heart rate onlyThe chest sensor sends basic heart rate to third-party apps, but does not transmit RR intervals.	Standard BLE	Standard BLE
Scosche Rhythm+ armband	Heart rate onlyThis row covers the original Rhythm+ model. RR interval output is not documented.	Standard BLE	Standard BLE
Scosche Rhythm+ 2.0 armband	Heart rate, pulse intervals, HRV (RMSSD), DFA-a1, and artifact rateRequires current firmware and HRV mode. Its optical sensor supplies pulse-derived RRi values, not ECG R-R intervals.	Standard BLE	Standard BLE
BerryKing Heartbeat 2	Heart rate onlyHeart rate is confirmed. RR interval output has not been verified, so Watchletic does not claim RR-derived metrics for this model.	Standard BLE	Standard BLE
Decathlon Geonaute ANT+ / Bluetooth HRM	Heart rate onlyUse Bluetooth; ANT+ is not supported by Apple Watch or Watchletic on Wear OS. The monitor does not transmit RR intervals to third-party apps.	Standard BLE	Standard BLE
TomTom Bluetooth HRM strap	Heart rate onlyThe monitor does not transmit RR intervals to third-party apps.	Standard BLE	Standard BLE
Fourth Frontier X	Heart rate onlyWatchletic reads the standard Bluetooth heart-rate stream. The device’s ECG, breathing rate, HRV, and other proprietary data remain in the Frontier service.	Standard BLE	Standard BLE
Running pods
MilestonePod	Running speed and cadence; distance and stride length when supplied by the podMilestonePod broadcasts the standard Running Speed and Cadence profile, which Watchletic supports on both platforms.	Standard BLE	Standard BLE
Cycling speed and cadence sensors
Wahoo SPEED	Cycling speed and distance	via watchOS	Not yet
Wahoo RPM Cadence	Cycling cadence	via watchOS	Not yet
iGPSPORT SPD61	Cycling speed and distance	via watchOS	Not yet
iGPSPORT C61	Cycling cadence	via watchOS	Not yet
Bryton cadence sensor	Cycling cadence	via watchOS	Not yet
CooSpo cadence sensor	Cycling cadence	via watchOS	Not yet
XOSS Vortex speed and cadence sensor	Cycling speed, distance, and cadence	via watchOS	Not yet

Interval data unlocks the richer metrics.

True R-R intervals measure the time between ECG R waves and require electrical sensing, normally from a chest strap. Optical PPG sensors can estimate pulse-to-pulse intervals, but that is a different measurement. Watchletic records interval values included in the standard Bluetooth Heart Rate Service and calculates HRV (RMSSD), DFA-a1, and artifact rate on both Apple Watch and Wear OS. Most optical monitors listed here send heart rate only; Scosche Rhythm+ 2.0 is a documented exception that can send pulse-derived RRi data in HRV mode.

Pair cycling sensors with watchOS first.

On Apple Watch, connect compatible power, speed, and cadence sensors under Settings → Bluetooth → Health Devices. Start a cycling workout in Watchletic and watchOS supplies those live metrics. Direct cycling-sensor support on Wear OS is not available yet.

Tested something that is not listed?

Device names and firmware behavior change. If you find a compatible device, or one that does not work as expected, email viktor@watchletic.com with the model, watch, and metrics you received.

Compatibility reviewed August 4, 2026.