(developer here)
Re: Speed graph:
From what I've read, NetGuard's speed graph could be a drain on the battery. Besides would showing connection speed in the app's homescreen suffice?
> I wish I could sandbox specific apps with honeypot contact etc stuff I don't think app needs to have but requires to operate..wtf.
fwiw, we started off by building a userspace application sandbox (many exist today, ParallelSpace, available on the PlayStore, is probably the gold standard), but the bugs and speed was just too dysmal and it seemed it required a long tail of development just to get a v0.1 out of the door. That said, another way to do sandboxing is to use apps like Island and Shelter that abuse Android's "Work Profile" APIs.
So, we switched gears, and instead started focusing on controls for the Network.
Re: Permissions management:
For permissions, specifically, we do have an alpha-implementation that works on AOSP, that auto-grants permissions when the app is in the foreground and auto-revokes it when it is in the background. We are yet to productize it and fix all its rough corners. It isn't priority, but something we eventually want to complete, even if just for AOSP.