Please try these other Metronome apps in the App Store:
The classic Metronome is no longer available. This simple metronome allowed musicians to mark time by giving a regular tick sound at a selected rate.
Drag the arm horizontally to start the arm. Tap to stop. Drag the arm vertically to change the tempo. Tap the "i" button to access settings and choose a time signature.
Metronome for iPhone, iPad, and iPod touch.