Doesnt work...

I have purchased this app for my ipad as well as my iphone. Two different devices and two different itunes accounts. But for a very long time the app has been un able to tell me the tune of my ukulele. When i pluck a string it just stays at A on the tone page. Please fic this it is an app that i rely on to tune my uke and untill its fixed i will be unable to play.

charles sheridan about PerfectTune - the Ultimate String Tuner, v2.2