Is there an app that allows me to use Google Scholar on an iOS device? I'm looking for a native app that allows me to use Google Scholar on my iPhone.

Does such an app exist?
There is no direct(native) application from Google for Google Scholar like Google Authenticator or Google Translator. But, there are some ios apps that supports Google Scholar search.

The best one, I can suggest you is Papers which supports Google Scholar.

You can also go with apps like Easy Search($0.99) and ArticleSearch(Free).