Tempo is a professional metronome for iOS devices.

It carries 35 different time signatures including compound and complex meters. You also get 6 rhythm patterns with the ability to customize accents. Tempo has good visual feedback in the form of pulsating LEDs and you have the option to use pendulum animation which you can turn off to conserve battery.

Other features:

• Tap tempo function
• Tempo ranges from 10 to 800
• Landscape or Portrait presentation
• Track number of measures played.
• Vibration mode
• Choose from 13 sound sets, including one optimized for live drumming click tracks
• Voice counting
• Pan audio left, right or center
• Store presets in multiple setlists
• Advanced setlist management including overwriting selected song, copying between setlists and multi
• deletion

• Share and backup setlists via iTunes File Sharing
• Italian Tempo Markings
• Pitch pipe for playback of all 12 chromatic pitches (calibration from A = 414 to 466 Hz)
• Multi-tasking support: plays in background, with audio from other apps
• Two themes to choose from: Classic Blue and Onyx (iPhone/iPod touch only)
• More optional themes via In App Purchase (iPhone/iPod touch only)