Guitar Tuner Pro: Music Tuning
MWM - Music and creative apps for Android
Guitar Tuner: Pro Tuning App
UXAPPS LTD
Guitar Tuner
TarrySoft
CherrySoft Limited
keuwlsoft
appsmz
GuitarTuna: Tuner,Chords,Tabs
Yousician Ltd.
Guitar Tuner, GuitarTunio
Apps Nemo
Pro Guitar Tuner
ProGuitar
Developer Useful