Why don't you just Google whether or not Tinder automatically updates your location, and spare yourself of this theorising,..
Edit: Here I've done it for you
The general consensus amongst most pages is that you have to open the app for it to update, or have it on in the background.
"Tinder, for example, only pings your location when you have the app open (including if you leave it on in the background). It keeps the data about its most recent ping, and throws out the previous record. So Tinder doesn’t actually know where you’ve been over time. It only knows the last place you were at."
Hmmm that was difficult now wasn't it... I'm sorry though, it does appear that she has at least opened the app, even if she didn't use it.
Which unis have sent theirs?