Its more than just foreign relations.
The reason for continuous military, space, energy and other development isn't just to push the state of the art, and its not just a jobs program. If you stop building things you forget how. You can still build something but it won't be nearly as good because the people who learned the mistakes the first time around have all retired. Or in this case fired.
We will have at least a 4 year gap when this is over.
Switching gears, do you think infrastructure will be funded? Falling 4 more years behind in maintenance isn't going to do any favors. This includes federally maintained dams and bridges, but also levees for storm protection near the coasts. Trump will throw you some paper towels after the next hurricane, then withdraw funding for FEMA.
How about the EPA? Are they going to continue to handle superfund sites? No? Well you can expect some real problems from this to bear fruit in a couple of years. Lawsuits against manufacturers doesn't bring your home value back, or stop the cancers.
I'm mentioning these things because while people are seeing the damage done by alienating allies, and that is concerning to some, this doesn't matter to trumps base, who have a particularly America centric viewpoint.
People need to be aware that the problems he brings aren't just foreign and that if something doesn't change soon there will be nothing left of the America they knew.
What services does it connect to?
Edit: after I posted I saw in the summary that you're not sure whatserviceds it uses either. I wonder if there is a way to get the specifics from f-droid.
You might check out ironfox to see if it also has the same issues.