First beta release for Canorum is available. There is still a lot of work left to do, but the basic feature set is complete enough for a (semi) stable release. Binaries can be downloaded from the Google Play Store:
https://play.google.com/store/apps/details?id=org.ciasaboark.canorum
Or from Github:
https://github.com/ciasaboark/Canorum
The Google Play Store listing was initially rejected until I removed most of the screenshots, so to see a preview hit the github link above.