Boyfriend of 6 months still has dating app on his phone, what should I do?

Anonymous
We met online, and developed really good chemistry very soon, maybe a little bit too fast. I deleted my account from the app and removed the app from my phone (he knew), he said he deactivated his account. I trusted him, so I never checked with him if he still has the app.

But the other day, I saw the app was still on his phone, when he was showing me something on his phone. (I never checked his phone)

How would you react if your gf/bf has dating app on their phones after you two are in a relationship.
Dump him/her
Vote A
We need to talk
Vote B
Let it go if s/he doesn't use it.
Vote C
Other
Vote D
Select age and gender to cast your vote:
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Boyfriend of 6 months still has dating app on his phone, what should I do?
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