The app complies with the inclusion criteria
The original app author has been notified (and supports the inclusion)
All related fdroiddata and rfp issues have been referenced in this merge request
I am the developer of the app phyphox at the RWTH Aachen University. With the release 1.1.0 (officially published on Monday in the other stores) we opened up the source under GNU GPL3 and want to offer the app through the main F-Droid repo.
Initially I had some trouble to build it due to some NDK/CmakeLists.related issues, but after some optimization and a "rm -r build/de.rwth_aachen.phyphox", "fdroid build -v -l de.rwth_aachen.phyphox" succeeds and generates an APK which runs on my phone (after signing it, of course).