Relationship issues

Me and my boyfriend have been dating for nearly 4 years. On Thursday night, after dropping my boyfriend off home, I went through his previously downloaded apps. I saw he had many ai girlfriend ai chat ai sexy chat apps, maybe like 6 of those apps. downloaded may of this year. i confronted him about it and was so angry. but we talked about it and he says he didn’t do anything. the apps interested him. he also said beforehand the apps kinda downloaded it themselves as when he was watching porn, those apps popped up, and hit a virus on his phone and downloaded and he was intrigued and checked them out. but he says that a lot of these apps you weren’t allowed to talk sexual and they had limits and subscriptions and such. he says that he didn’t talk sexually nor romantically. and he promises he’s telling the truth. he even told me he talked with this ai cat lol. he says he downloaded and “used” the apps as a one time thing and hasn’t since that day in may. he also said one of his old emails was connected to one of those apps and he had to delete the email. he says he’s sorry and that he loves me, and even when we were talking, he was very open with what i had to say and he kept telling me that he loves me, wants me, and that he doesn’t want anything or anyone else, fake or not. and i wanna believe him. i kinda do, but a part of me is stuck with the fact of, did he have the intention to cheat? and is it cheating? i dunno