I think this may be insteresting for musicians and students here. I released the best metronome app for iPhone and iPad. It is called TrueMetronome. Actually it is the best metronome app on ANY mobile platform but for now it is only available for iOS. So, what makes my app so special, you ask?
Firstly, TrueMetronome is the only app which creates perfect beats with ABSOLUTE ZERO latency. You can read in other apps descriptions how low their error, but they HAVE an error (latency) that's why their beats are unstable and professional musicians can hear it.
Secondly, TrueMetronome have the most natural sound of all metronome apps. All sounds are recorded from real metronomes, a beat does not affect the gradual decay of its predecessors, and each beat's sound is a little different from the others. TrueMetronome doesn't use some artificial samples, it recreates the sound of metronome in real time!
Thirdly, TrueMetronome recreates the look and feel of a real mechanical metronome; every mark on the scale is labeled with a tempo mark, the deviation angle of the pendulum depends on the tempo, and the tempo is selected by dragging the weight.