Stimpycat

As stupid as this may sound, I’d like to know how and why the AIDA64 app got on my phone. It’s a new [gorgeous] iPhone 8 with iOS 11.4 [but rumors claim iOS 12 is being released today, Monday, 9-17-18]. I was looking for something on the phone and I must have caused this to open by mistake. If Apple did, by chance, include I’d with the phone, I’d like to know why, as well as how it can be useful to me.