KV331 Audio has their SynthMaster One Powerful Wavetable Synth for the iPhone, iPod Touch, and iPad in the iOS App Store for FREE (regularly $9.99) for a limited time.
SynthMaster One iOS is KV331 Audio’s first full-blown universal synth app on iOS platform. It’s a powerful wavetable synth with an intuitive workflow. With its simple layout, rich wavetable/waveform content and inspiring factory presets library, designing new sounds with SynthMaster One iOS is a joy.