Audulus is described as 'With Audulus, you can build synthesizers, design new sounds, or process audio. All with low latency real-time processing suitable for live performance' and is an app in the Audio & Music category. There are three alternatives to Audulus for a variety of platforms, including iPad, iPhone, Mac, Windows and Windows Mobile. The best alternative is SunVox, which is free. Other great apps like Audulus are Modular Synthesizer (Paid) and KORG Gadget (Freemium).
SunVox is a small, fast and powerful modular synthesizer with pattern based sequencer (tracker). It is a tool for those people who like to compose music wherever they are, whenever they wish. On any device.
Modular is a powerful sound design tool which allows you to build your own custom synthesizer by connecting different sound modules together. By separating each synthesis process, modules can be connected in any way.