PPP-LooperSynth is meant to be used with other PPP instruments.
PPP-LooperSynth is a polyphonic synth coupled to a hexagonal keyboard layout. The controls allow you either to play it like a classic keyboard, but it can also record the notes you play in a 16 step sequencer and play them back as a loop.
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