As to adding addresses/doors: simply do it on location with Go Map! (iOS) or Vespucci (Android), real easy particularly if you added building outlines before or

As to adding addresses/doors: simply do it on location with Go Map! (iOS) or Vespucci (Android), real easy particularly if you added building outlines before or they are already there. Mapillary (mapillary.com) offers StreetView similar capabilities, including sign detection and can be used together with the desktop OSM editor JOSM and the in-browser editor iD.