Doesn’t work
Export Error
Not fully functional, it seems
Doesn’t work
So have stopped using.
Stopped working, red circle doesn’t appear
I uninstalled and reinstalled and still not working. Cleaned my camera. Re read directions, googled. Nothing.
App developer says we can tweet him, I only use Twitter for work, so. Maybe they will see this and reply? FX.
Response from developer
hi Jay, It seems that you need to provide access to the camera, basically if you do not see the red dot, it means that the app cannot access the camera and therefore the measurement cannot be taken. Please go to your iPhone settings (the phone, not the app) and ensure that the camera can be accessed. Feel free to reach us at hello@HRV4Training.com next time and it will be easier to help. Take care
Timer won’t start
Response from developer
hi there. This issue has been resolved, please update to the latest version and the timer will appear after 5 seconds. In case of issues, feel free to reach us at hello@HRV4Training.com. Thank you!
Stopped working
Response from developer
hi there. This issue has been resolved, please update to the latest version and the timer will appear after 5 seconds. In case of issues, feel free to reach us at hello@HRV4Training.com. Thank you!
Huge Improvement
This is better than most consumer HRV. If you are serious about measuring you HRV and want it to be easy and accurate, you need this. Very reasonable price too.
Keeps crashing
Não funciona no meu iPhone 8
Please make it available for iPhone 7+
Crushing up
3 readings in a row with totally different output!
3 readings in a row without changing the setting and I got 3 completely different readings! Spare your money!
Doesn’t work, never gets good data
This is unfortunate, as the companies other app, HRV4Training, is excellent and highly recommended. Use that up with a heart rate monitor and you’re golden. Ignore this app, it’s not worth your time.

