Spin Tuner app for iPhone and iPad

Spin Tuner is a simple but powerful tuner, ideal for stringed instruments. Select a preset instrument or create your own—for each note in the tuning, Spin Tuner sums the microphone input against the reference signal and shows you the relative phase and amplitude. Or in plain English: When the spinner stops spinning, youre in tune.

I made this because I was disappointed there werent any good free tuners in the App Store. If you like it and feel an overwhelming urge to pay something for it, Ive added a fancy color mode as an In-App Purchase. ITS LIKE A DISCO IN YOUR PANTS!

Enjoy!