Heat is a Synthesizer App for Android, available in the Google Play Store.
Maker, Nils Schneider, had this to say, "Heat is avirtual analogue subtractive synthesizer with online Preset Browser, everyone can share sounds directly from within the app. The synthesizer has full VST integration, use the Heat Android App as a controller for your VST plugin, design patches while on the way and use them later in a VST sequencer of your choice. This gives you some unique benefits..."
Pricing and Availability:
£2.53 (Pro version for Android)
A variable width bandpass filter and a voltage controlled mixer