This app finds incomplete and extendable data in your vicinity and displays it on a map as markers. Each of those is solvable by answering a simple question to complete the info on site.
The info you enter is then directly added to the OpenStreetMap in your name, without the need to use another editor.
Install StreetComplete APK on Android
1.Download StreetComplete APK For ApkDowner.
4.Follow the steps on screen.