There is a lot to be desired from this app still. I’m surprised it is such low quality given the expertise of the team.For example:- in the biofeedback session it should show the time elapsed/remaining. - The “feedback” HR graph is awful and doesn’t show the interpolated curve, just some stepwise measurements. It could really use auto scaling too! Not much better than paced breathing.- I have slightly larger fonts enabled in my OS settings and it makes this app look awful. Lots of the text gets cut off, but I figured out I can scroll.

Been using this one for several months. It’s a great app for taking and tracking my HRV each morning. It’s simple and gives me the info I need. With the biofeedback training I’ve learned my personal RF breathing rate and seen gains in my HRV because of it. Highly recommend for anyone looking to track HRV and improve it

There is a list of approved devices on their website. There is a number of . The Viiiiva (stupid name, I know) is listed on their website as approved, It is connected to my phone via Bluetooth 4.0 and when I try to use the app it doesn’t work. I suspect it would work perfectly if I spent another $50 on their proprietary measuring device. I don’t have the money. I’m trying to treat my ptsd while still paying off my cancer bills.

None of the biofeedback & mindfulness sessions work. There's no audio beyond a voice saying the title and it doesn't work at all if you turn off "show heart rate & track HRV".  To do the onboarding you’re forced to watch videos and ads to get the information. No written text is provided. Someone needs to QA the app before release.