Groove Rider GR-16 is an Electribe-style groovebox app for iPad, iPhone and iPod Touch. It has 4-voice polyphony per part and is 16-part multitimbral. Each part can either be a sample player, a simple but powerful synth engine, a wavetable oscillator that can import Serum wavetables, a slicer that will support manual slicing into up to 16 fine-tunable slices and MPC-style slice triggering, and finally one of the included factory instruments like basses, pianos, organs, guitars, brass instruments etc. More info at jimaudio.pro