Since version 2026.08.31, the Android and Linux version of CoMaps includes openly licensed reviews available via the Mangrove Reviews system.
Since version 2026.10.04, both apps also link out to MapComplete where users can leave reviews that are contributed to Mangrove Reviews - either anonymously or through their OpenStreetMap account.
The reviews themselves are stored offline in the map files, and are updated with each map update. As leaving reviews is done via the MapComplete website, it requires an internet connection.