So I made BSWX. The main features:
* It's ready to compose, record or play back in less than 1 second, on any device.
* It's a Progressive Web Application, which means it can be accessed via the browser or installed as an app on mobile and desktop.
* It records on the cloud but works well when Internet is down: it synchronizes automatically when you go back online.
* It can export MIDI files from your recordings for use on any Digital Audio Workstation.