Nice to see that the original intent of maps.me could be restored. For those who knew what Mail.Ru Group is (the company who bought maps.me at 2014), it was obvious that the app is going to become a junk very-very fast.
* they dropped paid version in dec 2014 (with all "pro" features, like bookmarks, being merged into free version)
* they opensourced it in 2015
* they added some OSM-editing capabilities in 2016
* they added bike navigation
I can't say how much of it is thanks to Mail.Ru, and how much - thanks to original developers, but it looks like the app was improving.
Note that in November 2020 it was sold to a new owners, - and after that, I believe, jumped down.