It is a relatively complete music sequencer and brings many features not commonly found in similar mobile apps. At the same time it attempts to hide some features so it can grow a bit on newbies and not scare them away. The goal is to have an easy to use tool for newbies, and at the same time something for advanced users to have in their pocket to quickly draft out ideas on the go.
You can take a look at the video, and join the alpha program on this website:
https://casualcomputing.info/sputter/
Some screenshots:



