Data usage question

I’m curious about data usage. Obviously, if you’re on your iPhone or 4G connected iPad (and you’re not connected to wifi) you’ll use data while syncing, but I’m wondering if the program is constantly connected to the network, using data?

The nearest example I can think of is Google Drive/Docs, if your using it on a network it will use data constantly while you’re working.

Does Scrivener only use Data to sync or constantly?

Only to sync.