Minutes, specifically hours. 2 hours a day. They do it to prevent me from sitting on my phone all day. They also have a content filter, but I don't really care about that.
I'm able to get around it if I set up my VPN before time runs out, or before my "bedtime" when my WiFi shuts off for the day.
But still, it's so ANNOYING. Even more so when I'm trying to do something productive, like my math homework, and I'm doing it on my laptop, and they keep needing to extend my time so i can get it done. And I'm just like whyyyyy.