The app is available for Apple devices running iOS and Android. It also includes a number of features that allow you to listen to how the sound changes as you adjust the tone in various ways. It essentially turns your phone into a tone generator, which allows you to apply tone correction to your music, voice recordings, and other sounds. Tonebridge is a mobile app that helps you improve the overall sound quality of your iPhone, iPod, and iPad. Tonebridge can be used to alter and improve the sounds of guitars, keyboards, vocals, and an infinite range of other musical instruments. It can also be used to improve the tones of your instruments, such as your guitar, keyboard, or drum set. Tonebridge is a unique software program for Windows, Mac OS X and iOS that can be used to improve the tone of your voice, and change your vocal timbre as well as your speaking voice.