Best Android Apps for Musicians

Auto-accompaniment app. I use it for practice and mocking up songs.

The only Android tuner I've found that really works.

Guitar Tapp
Guitar tablature browser.

Pocket Brooks Ear Trainer
Ear trainer for chord and interval recognition.

Time Guru
The best metronome. Excels at odd time signatures, mixed meters, and metric modulation. Also, it has a random mute mode for really challenging your time-keeping.