A free program for Android, by Kity.

Real Guitar App – Acoustic Guitar Simulator is an application that can turn your phone into a real instrument, just like a real guitar. All you need to do is download this app and use it. The sound is really good, and the app has an amazing design. It’s really easy to play and learn. You can choose the number of chords and the chords that you want to play. You can also change the sound with different numbers and chords.

You can use it for free and without any limits. You can play it for as long as you want and you can use it for every kind of music.