What would be the answer with a good outcome?
It is a dating app? Nope, then your girlfriend is cheating on you. (or at least thinking about it.)
It isn't a dating app? Okay, so your girlfriend isn't cheating on you, but you are spying on her.
It is a dating app, but you're okay with your girlfriend dating other people. Then why do you care?
It is an encrypted notification from a black ops agency who your girlfriend works for and you're 5 minutes away from the black SUV's pulling up. Nice knowin' ya.
It is a dating app, but your girlfriend was trying to arrange a surprise threesome for your birthday.
or, she's got a 10% off coupon from a new juice bar called "the smiling strawberry".