This seems, upon initial inspection, to be a nice GSF-independent free ad
free dual-SIM cellular & wifi signal debugger on Android
o Cellular-Z, by JerseyHo
<
https://play.google.com/store/apps/details?id=make.more.r2d2.cellular_z>
Previously I had used the free GSF-dependent app with ads:
o Network Cell Info Lite, by Wilysis
<
https://play.google.com/store/apps/details?id=com.wilysis.cellinfolite>
Where initial tests put Cellular-Z worlds above Network Cell Info Lite.
I don't know if it's possible to determine which apps are GSF dependent
while in Google Play, but Aurora very visibly lists, for every app, whether
it's GSF independent or GSF dependent.
One by one, I'm replacing my old GSF-dependent apps with GSF-independent
apps, which is part of my slowly emerging plan to free myself of Google. :)