Illustrator on iOS

So I use Illustrator on my computer but been wanting to move to a touch screen device, I have an iPad Pro and tried the app out but having a hard time navigating around the app. The main feature I use is the Unite tool in Pathfinder, I cant seem to locate this setting in the iOS app. Is this feature in the iOS version of the app? If not it looks like I will be purchasing a Surface Pro. Thanks for any tips!