Fortnite game activity?

Can I theoretically see how often my brother plays Fortnite? He says he does not play that much, but I see him playing all the time and now I'd like to show how often he actually plays this game. Is there any possibility.

Yes, just download the Ps4 app if you have a Ps4 or your brother and bumm you can see how long he plays a day

I'm sure that will not interest him much. But the idea that this would work to somehow "shock" him, I think almost cute.