WTF?

First time using it and its incredibly buggie - wont move to tune the next lug (stays one same lug and doesnt save setting) - doesnt save my drum specs - seems like some of the menu at the bottom is blocked by a keypad, so I dont know if its covering a save button (iPhone 6).
NOT HAPPY

Scarlett883 about Drumtune PRO | Drum Tuner, vV 1.1