AcidDrums is meant to be used with other PPP applications.

AcidDrums is a 16 step sequencer offering live controls over repeating effects. It also offers four fully synthetized drum sound.

PPP is a framework offering to support midi jamming over wifi features to audio applications and instruments. That means that apps can be connected to each other over wifi with a slave/master paradigm enabling each sequencer to be in synch with each others. It can of course be used as a standalone sequencer. More here : http://ppp.mgsx.net