@Tommy We're arguing semantics here, but I think it's important to get the details right.
Every single application on F-Droid is 100% FOSS. All of it.
Now, what do I (and everyone) mean by "application on F-Droid"? It's the code that actually runs on your phone. All of that is 100% FOSS.
Now, some of the apps on F-Droid are going to connect to servers that run proprietary software, but the application itself has no proprietary components.
@Tommy
Even Stallman doesn't mind applications connecting to servers that run proprietary code, as long as you don't run proprietary code on your machine.
That sounds like something made up 
@Tommy https://www.gnu.org/philosophy/network-services-arent-free-or-nonfree.html
"If some of them are nonfree, that usually doesn't directly affect users of the service. They are not running those programs; the service operator is running them."
"if the service operator runs GNU/Linux or other free software, that's not a virtue that affects you"
"Thus, we don't have a rule that free systems shouldn't use (or shouldn't depend on) services (or sites) implemented with nonfree software"
@Matter
I'm still not on your side.
A app that has a Non-free network has no meaning to 100% FOSS.
@Tommy well, you're wrong. If an app does not contain proprietary code then by definition it is 100% FOSS. Which is a requirement to be included in F-Droid.
@Matter
So your telling me the 100% FOSS goes only to the client?
Sorry, I'm still a bit of a beginner..
@Tommy @techit the client is on F-Droid. The client is FOSS. It talks to the server, which is proprietary. This doesn't mean that the app isn't FOSS. An app is just the thing that runs on your phone, and that's FOSS.