Ultimate Guitar Tabs and Songsterr are mobile apps that show guitar chords for many songs. These apps are available for both iOS and Android devices.
Ultimate Guitar Tabs is the app of UltimateGuitar.com, a popular guitar chord website. It features a large user base that uploads, edits and rates tabs and chords. They offer a free version of the app, as well as a Pro upgrade that includes tempo control, audio track accompaniment and scrolling playback.
Songsterr has the unique feature of playing the tablature in time to a song's tempo. As the music plays, the app moves across the screen and helps the user play along as it goes. The app only shows one chord version of each song, unlike Ultimate Guitar which presents multiple chord versions. The free version of the app offers quick preview clips while the monthly subscription gives unlimited access.