Hearing Test - Ear Audiogram

I I experienced left side hearing blast and I needed to track my hearing during treatment process. I downloaded about 10 apps by far this app was the most accurate , precise and user-friendly. One option, which is so interesting to me was that I had ringing sensation which interferes to my detection of noises and what I choose it’s wrongly, without any taking more steps app would retest me automatically. Wonderful job!

Missing the DAF and FAF Function that can be used all the time without the lessons. Please restore it.

The exercises seem good but there is not enough tutorial. The FAQ gives you an explanation but nothing to show you how to work the sections. That is frustrating as It seems like a great app but I am not 100% sure how to use it properly. Do I need the headphones? How do i playback my wav? Is it only during the reading? How do I track progress?