Metronome Poku Poku app for iPhone and iPad

Metronome with a star pendant for practicing music.
You may change tempo range from 12 to 240 sliding the pendant on the bar. Or adjust using + and - signs.
Four rhythms; 4 beats, 3 beats, 2 beats and 6 beats are available.
You can select a tick sound at preference screen.
Auto stop timer is adjustable from 1 minute to 60 minutes.
Metronome continues in background mode. While in the background mode, you can pause it or restart it on the lock screen without opening the app screen.

The simple tuning fork has standard pitches of 440, 442, 465, 435, 415, and 392Hz as presets and can be adjusted freely.