Largely free software for mobile music making 27/01/22
Sunvox is a small and highly efficient modular synthesizer and pattern-based sequencer designed to be used on portable devices. I first encountered it on the Pocket C.H.I.P., but as the mages on their website will testify, it runs on all kinds of PDAs and portable devices. It has a very impressive set of features and is free on most systems, except the Android and iOS.
Here are the specs:
Highly optimized synth algorithms, flexible architecture; SunVox works on a variety of devices with different CPUs;
Supported systems - Windows (2000+); macOS (10.9+); Linux (x86, x86_64, ARM (Raspberry Pi, PocketCHIP, N900, etc.), ARM64 (PINE64, etc.)); iOS (9.0+);, Android (4.1+); Windows CE (including Pocket PC and Windows Mobile; ARM only);