This is ad free version of Metronome 2.2.
Before pay for Metronome Pro, users are strongly recommended trying the free version (with ad) first, which will make sure Metronome Pro can work fine on the device.
Metronome Free Version (Ad Version) can be found at:
Read Phone State: Stop beating at incoming call;
Record Audio: record practicing music;
Write External Storage: save recorded audio to sdcard;
Internet & Access Network State: Metronome Pro use this to report bugs.