Also, it's very easy to start downloading an offline map for any region - just zoom in on a new area, and it provides the link for that region. Right now it's free, unlimited and it works all over the world (though of course that can change in the future). I haven't figured out how to do the same thing in Osmand, and it says the free version is limited to 10 maps.
The official Osmand can sideload any number of maps too, the limit is only for direct downloads; but common users won't know how to get their own maps without support from the app.
I could do it for them myself, but then they wouldn't be able to recommend the tool to their friends in turn - which is my litmus test for any open source software intended for end users.