Compare software

HRV4TrainingLens HRV
Paid

Paid app, with additional Pro and Teams options for coaches.

 Free

Free and open source under the GPL-3.0 licence.

Android, iOS Android
  • Measures HRV with the phone camera, no sensor needed
  • Supports Bluetooth chest straps, Apple Watch and Oura
  • Uses only the phone camera, no extra sensors
  • Open source and available on F-Droid
  • Needs consistent daily measurements to be useful
  • Pricing not detailed on the homepage
  • Camera PPG is less precise than a chest strap
  • Android only
Downloadable app Downloadable app
Closed source Open source
License not stated License: GPL-3.0
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 24, 2026

Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.