Received the "pro" version from my school and it works great. Audio is recorded well enough but I believe my phone is somewhat at fault. App may stop recording though so keep an eye out. I had a reminder set though a lender, it went off, then I checked and realized it wasn't recording. One minor hiccup though.
Constantly closing Every time I press something on the app, no matter what it is, the app closes. It's not like it's crashing, it just closes as if I pressed the home button. It is very annoying. I am on a Samsung S5 with lollipop 5.0