AffinityBlue has Tunable (iTunes Link) for the iPhone, iPod Touch, and iPad in the iTunes App Store for FREE (regularly $2.99) for a limited time.

Tunable is a chromatic tuner, tone/chord generator, metronome, and recorder that helps you learn to play steadily, in tune, and on beat. Featuring a unique “tuning history” display for visualizing pitch over time, Tunable is the perfect toolkit for beginning to professional musicians.