Tunable is a great creative re-invention of the typical metronome and instrument tuner. The user interface is easy to use and eye-catching and unlike other tuner, or metronome apps, the settings are straightforward and easy to use. These features really place Tunable in a class of its own.
The idea behind Tunable is that it presents the frequency of any given note in a visual form. When you play an instrument, or sing in the proper frequency, the visual sound wave will stay in the green area. Going out of that frequency range, the sound wave will move into a pink area and the app will tell you what note(s) are being played.
Notes and chords (combinations of notes) can be sustained as well. This is a good feature for someone who plays a wind instrument, or a singer, as they can practice hitting and holding a specific note.
The metronome is unlike anything I have seen. It's an innovative approach, instead of trying to mimic a real life metronome on the iPhone. This gives you more options and an easier to use time keeping device.
The metronome can be set with a BPM (beats per minute) tempo, or traditional Latin. The beats per measure can be easily set using + and - symbols, and the subdivisions of those beats into eighth notes, sixteenth notes, thirty-second notes, etc., can similarly be decided upon.
Before this I had about two tuning apps and a couple metronomes. Now I just have this one app.
Compatible with iPhone, iPad, and iPod touch.