OP I actually don’t know if this is a range scanner, but it’s a port scanner that might have range scanning features. Try Port authority
Fennec is not maintained by Divested, but who they actually are maintained by is a mystery. I hear a mix of Mozilla themselves and that it’s just firefox with different build scripts. The F-droid page links to everything firefox except the issue tracker, which links to here.
The “freedom” that this offers is negated by DJI’s proprietary drone software. This just allows assholes to fly drones unrestricted, and doesn’t make the drones any more “free.” They are still under control of DJI if DJI wants to.