This is a great app to use when you are running. I used one of these tracks during my 5K this last Halloween. It is a great app to help you drift off to bed. It is also a good to have playing in the background while you and your partner are playing in the foreground. This app makes walking the dog and driving to work even more pleasurable experiences now. If you are looking for audio tracks to help with your Tinnitus Retraining Therapy, you can use these. I have had to contact the customer support several times due to a few different issues. Usually with me having a new phone or something. They were always prompt response and very helpful. When you buy an iPhone, and if you like your ears, download this application.