Getting advice

I see people do this so I thought I'd give it a try. For the first time because I've been suspicious but I never wanted to go through his phone. We are engaged to be married in a year. Trying for a baby. Anyways I went through his phone to find a Vault-Hide app which hides pictures, texts, contacts, videos. Also I found a porn app which he goes on frequently. Would you confront him? Wait it out.? I deleted and uninstalled the vault app. Gonna see if he asks me about it which would be dumb bc I'll tell him that's a cheating app. I don't know what to do?