RTTATuner

This is a wonderfully useful tuning program. Great compact interface with enough detail to be really useful. I’d love to have an OSX version too!

Performs as intended, within the limitations described on McGee's website and imposed by the iPhone mic. Useful both for evaluating instrument characteristics, and also consistency of the player's intonation control. My only gripe: on a phone, the display is very small. I wish a version for iPad had been included.

For the student seriously working on their intonation, this tool is a necessity. It provides feedback over a longer period, say the length of a piece, instead of moment by moment as a meter does, This gives a huge advantage to those developing that all important relationship between the ear and the instrument. It should be in every flutist, recorder player, or ethnic flutist's tool box.

Great app but has started crashing a lot under IOS 11.0

I purchased the app and shared with my family. It works very well on my phone and my daughter loves to leave it on to check whether she is in tune. I am not giving it 5 stars because the app keeps disappearing from my wife’s and daugter’s phone. I hope this gets fixed soon. Otherwise, it’s excellent.