VAPolyMkII is a virtual analog bitimbral polyphonic synthesizer available for iPhone, iPad, and Mac. It offers a 16-voice synthesizer with effects, a sequencer, and audio visualization tools. This versatile tool functions as a stand-alone app or as an AudioUnit Extension (AUv3), supporting Ableton Link, MIDI, and audio file export.

The synthesizer comprises two 8-voice synthesizers, each with two oscillators, two ADSR envelopes, resonant high pass and low pass filters, and an amplifier per voice. The oscillators feature variable wave shape and modulation options. Modeled after classic analog sound circuits, the filters include Sallen-Key and cascaded OTA models. Effects like delay, chorus, flanger, reverb, eq, and compressor enhance sound manipulation. The sequencer allows for piano roll editing and parameter automation, enabling the creation of 16-bar patterns per clip with project file saving on iCloud Drive for cross-device access.