I had my hearing tested, by a professional (in the soundproof room, etc). Out of curiosity, today I downloaded several apps to check their results against the professional results.
Several of the other free apps were close but HearingTestEarAgeTest produced the same results as those provided by the Audiologist.
To the developer: You are selling yourself short. I realize that a lot of people who visit HearingTestEarAgeTest Store only explore “free” apps and charging for your app may cost you money compared to that you make with the adds.
However, if you were to charge one or two dollars for the ability to save results, I would, without hesitation, pay for that ability just because of the professional results, ease of use and my appreciation of both. If you did this, you could still capitalize on your advertising revenue.