Works very well -make sure volume is correct at 50%

This app helped me when I experienced sudden hearing loss. A daily test allowed me to track progression of the hearing loss. You need to make sure that your volume is set to 50% (thats 8 bars on my iPhone volume) before you open the app and it will work just fine. If the earphone options are grey and unclickable then it means your volume is not correct.

Hiqswirl about uHear