This guide could be an article showing step-by-step how to use these apps and/or mention on Recommended Maps and Navigation Apps - Privacy Guides, with privacy implications of such apps.
Apps to contribute:
If you guys have other app recommendations or tips, please share it.
StreetComplete is dead simple to use. No guide necessary.
I think it is not advisable to write guides for improving specific tools / services.
But I think would be a good thing to promote bug reporting, active user feedback, active feature requests, etc. in general as these could drive service providers to improve their services.
Example use cases
When someone sends you a Google Maps link, but you prefer using OpenStreetMap, you can quickly open the same location in OsmAnd or Organic Maps.
When you like Google Maps for finding places, but you prefer a different app for navigation, you can easily switch from Google Maps to your favorite navigation app.