I've been using an HRV app and feel that this is a well-designed app to correlate heart rate and breathing cycles. I purchased the unlimited time using the iPhone camera upgrade as I couldn't achieve 100% coherence within the 1:30 time for the free app. Also, did some reading through Google searches to understand those concepts better.

I used your app when it first appeared and really liked it. Thought it was awesome. That was a long time ago before you decided to start charging for it. OK, I get it, you need to make some money off your development. No problem with that. why can’t you get it to work with my watch? I don’t really wish to pay to have to jam my finger on the back of my phone to get the same functionality I had before you started charging. What’s the deal? Is it to sell different sensors? Does HeartMath have you ever a barrel? It seems like there aren’t a lot of reviews considering how long the app has been out. I’m wondering if this is just a side project that has been partially abandoned and you’re just making a few bucks off the people that decide to pay for the ability to stick their finger over a lightbulb. Again, my main question is why will it not work with my watch? I would pay for the app if it will work with my watch. My watch is Bluetooth. Why will it not work? It’s somewhat infuriating that all these apps that do heart rate, variability monitoring, etc., want to force you to buy another device. Anyway, please answer my question so I at least know that maybe someone is reading these reviews. Thanks.Other than not having a coherence feature, Welltory seems to be the best app I have found so far that doesn’t force me into buying another piece of hardware, FYI to anybody that cares

Bought Classic. Flash was on and finger correctly positioned over lens. App doesn’t work. Requesting refund.Developer responded and instructed me to update to new version which addresses and corrects heart rate detection failure. I updated app and enabled camera in iPhone settings. Heart rate detection failed repeatedly. I will request a refund.Update: I got app to detect heart rate by completely covering iPhone 11 Pro lenses with two fingers. Will cancel refund request.

Works really well as an alternative to the more expensive HeartMath systems. Agree with one of the previous viewers that it would be nice to have some kind of audio feedback for breath and coherence so I don't have to keep my eyes focused on the screen during sessions. Especially when I use it a night or before bed. Other than that, it's great!