Never leave home without this
(free app for iPod touch, etc.)
http://itunes.apple.com/us/app/steinway-metronome/id393021343?mt=8FEATURES
* Clear, accurate time-keeping
* Displays the correct musical term for the current tempo
* "Tap" mode lets you find the tempo of a piece by tapping along
* Works in both portrait and landscape modes
* Dealer Finder lets you find the exclusive Steinway dealer in your area
* Customizability:
* 9 time signature settings: 2/2, 2/4, 3/4, 4/4, 5/4, 3/8, 6/8, 9/8, 12/8.
* 8 wood finishes available: African Cherry Makore, Cherry, East Indian Rosewood, Kewazinga Bubinga, Macassar Ebony, Mahogany, Santos Rosewood, and Walnut
* Interface Sounds switch
* Visual indicator settings: flash on all beats, downbeats, or none.