Tap to Translate Screen app for iOS?

I'm looking for an iOS app (preferably a free one) that can translate any language inside another application that does not have any copy-able text.

For example: Android has an app called Tap to Translate Screen that when you tap, a button shows up that translates all text on the current screen.

I can't find any apps for iOS that supports this feature, so I'm wondering if anyone else knows of any to play foreign games/apps. Taking a screenshot and translating the screenshot in Google Translate is such a hassle, there really should be an easier way.