A South Korean company called
The Good Ear (which is part of a larger company called Earlogic) is now offering an Apple app for free that tests the users hearing. The
Better Hearing app also can treat the issue for a one time fee of $4.99 using Threshold Sound Conditioning. It targets the frequencies in which the user has the weakest hearing. The company claims 30 minute daily treatments can improve hearing in just two weeks. Find out more
here.