Could easily be 5 stars but...

This is the best tuner out there, as long as you only use your iPad in the vertical mode. Because thats the only way it works visually.
It will not rotate horizontally. So if you want to use it as part of a setup with Audiobuss, its very disconcerting, as all the other apps using Audiobuss are set up to work horizontally. Which makes it very uncomfortable to use unless you use it as a stand alone. Get in the game guys !

Digaudio about UltraTuner - Precision Tuning