Chords are the lifeblood of music. It's no wonder that most of OnSong revolves around what you can do with chords.
You can write and edit music right inside of OnSong. OnSong understands both the OnSong and ChordPro formats, and even works with most text files too. You can also use different ways to display chords and lyrics in your song.
Tap on the speaker icon in the upper left corner to toggle chord playback on and off. Playback does require a sound bank to be installed. You can purchase sound banks in the Add-Ons Screen. You can alter the way chords are played under the Utilities Menu » Settings » Live Settings » Chord Playback.