Heat Synthesizer Demo is a virtual analogue subtractive synthesizer for Android with a unique feature set. It boasts a highly optimized real-time sound generation engine with a lot of features, making it an excellent choice for mobile devices. The synthesizer comes with three oscillators, two filters, four envelopes, an FX section, and much more.

One of the standout features of Heat Synthesizer Demo is its collaborative preset manager. Users can browse through thousands of sounds that other users have created, save their sounds on their local Android device or online, and make them available for the community.

Another exciting feature is the Full VST integration, which allows users to use their Android device as a controller while Heat Synthesizer is running as a VST compatible plugin (Windows x86/x64). Users can control the VST plugin from their Android device in real-time and see parameter automations from their sequencer in real-time on their Android device. Additionally, the integrated keyboard of the Android device can be used to send MIDI events to the sequencer.

It's essential to note that the Demo version does not support saving sounds. Also, the software is still in BETA, so if users encounter any issues, they should contact the developer.