Is checking their devices necessary?

I recently found out my partner has a porn addiction as well as he jerks off to girls he knows. I was absolutely crushed by this at first. More so the mutual friends part. The porn part I can understand and deal with and support. I haven’t fully decided if I want to give this relationship a chance yet, I won’t go into details as I am not looking for advice in that department. However, during my soul searching and seeking if I do decided to go through this and give it a shot. I have some questions, is it really necessary to have accountability apps on his phone? He is going to therapy and completely opened up and owned up to all of this on his own with complete guilt. But I don’t know if it feels healthy for me to be hovering over him and keeping track. I figure if he ever does relapse that he is a man and I have done enough research to understand they will find a way regardless. I more so would offer these apps and tracking as a tool for him and to help him, not to help me as I don’t think it would bring me any particular sound of mind or reassurance. I will only be giving him another chance if I can bring myself to give him trust bc otherwise I don’t want to be in a relationship without trust. He knows that he can come to me and tell me if he has urges or ect. Is there something I am missing with these tracking apps? I don’t mean to be judgmental but my mindset is if he wants to he will find a way regardless. What is everyone’s reason for using these? And should I look into it more for him? Or am I missing a key point. My point is, if I decide to give him a chance, should I be checking his phone? Bc I rlly don’t want to, I don’t think that’s healthy for me and I don’t want to be in a relationship where I need to do that. But I want to educate myself more. Plz give me insight !