Thanks Tony! I opened the app and thought the hearing test was interesting....I know I don't hear much below 50-60db through out the frequencies. My tinnitus is a little more complicated....I have a constant high pitch ringing that never lets up. I have worked with a Tinnitus specialist in Milwaukee that got me going on the sound generator...TINNITUS AID is the app...it's free for the basic mode. If I listen to sounds that mimic a river or brook stream it relaxes me after a half hour. I have learned to live with the high frequency ringing. About a year ago I started having a very low frequency hum that bothers me....something along the lines of a exhaust fan and it seems to get louder as the day goes on or if I go into a public place with much noise. It will actually become mind numbing for me. Its interesting because I retired several years ago and the low humming sound I now hear almost reminds me of my work environment...my office was located above an industrial compressor room...it sounds almost identical to that noise! I realize that tinnitus is a brain function that is trying to provide feedback due to the fact of my hearing loss....from reading these helpful blogs it is obvious that everyone may be dealing with something unique to themselves....it is good to read other peoples issues. If I try AUDIOCARDIO out I will report back. I just don't think a two week trial will cut it for me!