"App" is the abbreviated term for "application." An "app" is simply a software program for a mobile device like a smart phone (iPhone®), tablet (iPad®), or handheld music player (iPod®). Apps perform a variety of functions and allow you to customize a device to your particular hobbies, lifestyle choices, wants, and needs.
Many hearing aid manufacturers currently offer smartphone and tablet APPs for their devices.
Apps from Hearing Aid Manufacturers
Apps for Hearing, Managing Tinnitus, and Captioning
There are also apps that enable a smartphone to perform like a generic hearing aid, help with tinnitus, and provide captioning. Click here for a list of these applications.