To accurately measure Heart Rate Variability, your heart rate monitor of choice must:
- Capture and transmit accurate R-R Intervals (also called Inter-beat Intervals or IBIs)
- Transmit the unaltered R-R intervals via Bluetooth 4.0 or ANT+.
- What are R-R Intervals?
Compatible Heart Rate Monitors
The Full App Heart Monitor+ HRV is compatible with any heart rate monitor that accurately measures R-R intervals and has Bluetooth 4.0 or ANT+
The following HR monitors have proven to work well with the Heart Monitor+ HRV app:
- Polar H10 (BLE / ANT+)
- Polar H7 (BLE)
- Wahoo TICKR (BLE) Only Bluetooth BLE is HRV accurate, ANT+ is just HR accurate
- BlueLeza HRM Blue – (BLE / ANT+) Only available in Europe
- 4iiii Viiiiva (BLE / ANT+)
- Zephyr HxM (make sure it’s Bluetooth 4.0, not 2.0!)
- Cardiosport TP3 (BLE / ANT+)
- Suunto Smart Belt (ANT+)
- Garmin Premium (ANT+)
- Garmin HRM TRI (BLUE) (ANT+)
- Garmin HRM SWIM (BLUE) (ANT+)
- Garmin HRM-RUN (RED) (ANT+)
- Garmin HRM-RUN (BLACK) (ANT+)
- Garmin HRM-Dual (BLE / ANT+)
The Heart Monitor (DATAFIELD) is ONLY ANT+. Bluetooth (BLE) only HRMs will not work. Requires ANT+.
- Heart Monitor (DATAFIELD) -> Requires ANT+
- Heart Monitor (DATAFIELD) will not work with single radio Bluetooth(BLE)
Not Compatible Heart Rate Monitors
The following monitors do not transmit accurate R-R intervals, thus are not able to be used for measuring HRV. However, in most cases, they are fine for measuring basic heart rate.
- Wahoo BLUEHR*
- Wahoo TICKR FIT Heart Rate Armband*
- Polar OH1 Armband*
- Vernier Go Wireless Heart Rate*
- MyZone MZ-3*
- UnderArmour UA Heart Rate*
- LifeBEAM hats
- TomTom BLE HRM*
- Mio ALPHA
- Scosche RHYTHM+*
- Lezyne HRM
- Most cheap chest straps sold on Alibaba
- Knock off brand monitors
*Confirmed by the manufacturer
The following HR monitors are not open to 3rd-party platforms and therefore are not compatible for use with Heart Monitor+ HRV.
- Whoop wrist device
- iThlete Finger Sensor
- Heartmath devices
- Oura ring
- Motiv ring
About PPG (Photoplethysmogram) and Pulse Oximetry Devices
True Heart Rate Variability calculations require accurate measurement of the time between each heartbeat. Unfortunately, most wrist bands and watches that use LED/Pulse Oximetry type sensors are not accurate enough yet to capture the exact R-wave peak. Technology has advanced to where these devices can accurately measure basic heart rate now, but that is because heart rate is not sensitive to the tiny changes the way that HRV is.
As an example: If your heart rate is 60 beats per minute, your heart could be beating once per second. In this case, if you were measuring the time between each beat in seconds, it would be 1s, 1s, 1s, 1s, 1s. OR… Your heart could be alternating speeds – something like: 1.17, 0.97, 0.83, 1.03. Either way, your basic heart rate could still be 60 beats per minute. But your heart rate variability would be significantly different in these two scenarios.
Many devices are not built to measure HRV, so they simply smooth out, or average, the R-R intervals to make it easier to report basic heart rate.
Your device not listed here?
Due to the large number of devices on the market, we are unable to test them all for accuracy and compatibility.
If you are not sure about the above information, your device’s manufacturer should easily be able to tell you if their device meets the criteria for compatibility. If they can’t, then we would recommend not doing business with them. Look for the contact form on your device manufacturer’s website. Here is how to find out if your device is compatible:
Send a message to your heart rate monitor’s manufacturer asking, “Does this heart rate monitor capture accurate RR intervals? If so, does it alter or smooth the R-R intervals in any way? Also, does it have Bluetooth 4.0 capability?” – make sure to tell them what heart rate monitor you have.