I liked...



It'd be great for use before stressful events such as exams or public speaking. Just the act of opening the application would be grounding in these moments. Really simple and modern design. Easy to access the breathing/heart rate screens as soon as the app is opened rather than having to navigate through a lot of screens. No sign in/sign up was very desirable too. :)

I didn't like...

The only issue was that the heart rate monitor is difficult to use with iPhone cases and I had to take mine off for my fingerprint to register however I'm believe that's an issue that might be difficult to mitigate.