Hi,
this is what I understand from OsMo source code:
It seems like a personal tracker, so that when you give people a "personal" link they can always see where you are from a browser.
You have to enable the OsMo plugin, register your device and start the tracking service, if you want to use this service with OsmAnd and want to be tracked and track other users.
After that you can join a group, all group members can see each others position on the OsmAnd map.
It seems to be possible to send signals/messages to other users within your group.
Is seems to be possible to navigate to a user, shown on the map, maybe also as a moving destination.
It is possible to read some device information (battery status).
Is it a replacement of the osmodroid app or only a plugin to connect to the osmodroid app?
I don't know, if it is a replacement, both seem to use the same server and both seems to be compatible to each other.
Regards,
Max