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# HRi: Heart Rate Info app</p><p>1) Lets you compare hear-rate as measured by your watch's optical sensor vs an Ant chest strap.</p><p>2) Show traces of heart rate and cadence over about last 2 minutes.</p><p>3) Investigate HRV (heart rate variability) by looking at RR intervals. The app shows a measure of HRV (Heart Rate Variability) as ln of rmssd of RR intervals (root-mean-square, of successive differences).</p>

What’s New

# HRV Dev Screen (disabled by default)</p><p>- HR from Ant HR strap: Current value and trace (in red)</p><p>- rmssd of RR intervals</p><p>- ln(rmssd of RR intervals)</p><p>- Info on number of good/bad RR samples when calculating rmssd of RRs.</p><p>- Status of Ant HR connectivity</p><p>- Traces of: HR from watch and Ant chest strap; RR interval; lnrmssd.</p><p></p><p># RR Dev Screen (disabled off by default)</p>

Additional Information


This app requires access to:

  • Send/receive data via ANT radio to/from third-party sensors
  • FIT files (activity recordings)
  • Record additional information into activity files
  • GPS location
  • Sensor data (i.e., ANT+, heart rate, compass)
  • D2™ Bravo D2™ Bravo
  • D2™ Bravo Titanium D2™ Bravo Titanium
  • ForeAthlete® 235J ForeAthlete® 235J
  • ForeAthlete® 630J ForeAthlete® 630J
  • Forerunner® 235 Forerunner® 235
  • Forerunner® 630 Forerunner® 630
  • Forerunner® 735XT Forerunner® 735XT
  • fēnix® 3 fēnix® 3, quatix® 3, tactix® Bravo
  • fēnix® 3 HR fēnix® 3 HR
  • fēnix® Chronos fēnix® Chronos
Average Rating: (3 Ratings)

December 30, 2016

This app crashes my FR 735XT causing it to restart having collected seemingly no useful data. I shall try it a few times more, although it would be appreciated if this issue were fixed....

Ralf Groot
December 26, 2016

It's the only app with HRV. Unfortunately it restarts my 735xt after about 20 seconds every time. Hope there will be a solution for it soon.

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