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Help improve OpenStreetMap with StreetComplete
(streetcomplete.app)
If it's free and open source and it's also software, it can be discussed here. Subcommunity of Technology.
This community's icon was made by Aaron Schneider, under the CC-BY-NC-SA 4.0 license.
I've been using SCEE which gives you more options https://f-droid.org/packages/de.westnordost.streetcomplete.expert/