I was going to suggest this as well, but per the inclusion policy on F-Droid:
- We cannot build apps using proprietary tracking/analytic dependencies like Crashlytics and Firebase. Please talk to upstream about an untainted build flavor (either using a FLOSS analytics software like ACRA or by removing Non-Free dependencies completely).
geeksville already considered this, apparently.
So that’s a big no-go – Crashlytics is very useful, and F-Droid does not permit it. Same for mapbox – some of the code would need to be re-written to use another map provider, like osmdroid. Moving away from either will take time away from other tasks.