StreetComplete: Quest-based OSM editor for Android

> StreetComplete is an easy to use OpenStreetMap editor for Android phones and tablets, used for mapping in the field.

> The app is made specifically for casual contributors and beginners as no prior knowledge about OpenStreetMap (such as tagging schemes) is required to contribute with this app. Furthermore, there is a bit of gamification and statistics that aim to introduce and try to inspire users to venture deeper into the world of OpenStreetMap.

Last discussion slightly over a year ago: https://news.ycombinator.com/item?id=27549300

And two years ago: https://news.ycombinator.com/item?id=23127379

I recently discovered it when browsing through the F-Droid repo and thought this was a great way for me to help bringing our horribly outdated OSM data (in my area) back up to date.