Almost great

Best, most precise, most stable tuner out there. Easy to read display, straightforward and clean user interface. And you can adjust the reference pitch, select alternate temperaments, etc.

BUT...

it only has landscape orientation display. I have an iPad, and I use at gigs it to store sheet music, so its in a stand in portrait orientation. So if I try to use this otherwise ideal tuner, the display is sideways! Come on guys, almost every other app in the world orients its content to match the rotation of the device its running on. Please add this fundamental feature!

hele on about AccuTune - Guitar Tuner