Supreme from Sunz of Man / Wu-Tang, who released Supreme MPA on Android about a year ago, is now raising funds on Kickstarter to build the first free hip-hop production app that would rival professional software like Reason or FL Studio. It's going to run both on iOS and Android and will be completely free of charge.
Some killer hip-hop specific features that are planned include the YouTube sample importer and BassBlaster for low bass sounds.
The goal is high, and if it's not reached they won't get anything (that's Kickstarter rules). Check out what's happening at supremempa.com