I know I'm way late but you do realize you could use most Google apps on ios right?
No, you can't run any Google/Android apps on iOS.
There's a lot of overlap between the Android and iOS app catalog, but they aren't the same apps (as in the same version of the program). If an app shows up in both stores, then the developer chooses to release a version for Android and a version for iOS, and there are some apps that are exclusive to one or the other.