¡Nice! In my #fdroid workshops I promote #Streetcomplete as a brilliant app for beginners and experts that you can use to contribute to @openstreetmap while enjoying a geocaching-like adventure at the same time. And that my only feature request would be some gamification e.g. with "awards" or "achievements" to motivate even more people to contribute.
Now I realise this has been implemented since version 19 \°/
Server run by the main developers of the project It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!