Also, as far as I know, Swift on iOS doesn't have anything eval()-like [On the Mac, there is a REPL (https://developer.apple.com/swift/blog/?id=20)]
I would think the easiest way to evaluate Swift code 'on' a iOS device would be to send it to a Mac, but as said, I don't think this app evaluates Swift code.
(Again, at least not as far as I've gotten).
Also, as far as I know, Swift on iOS doesn't have anything eval()-like [On the Mac, there is a REPL (https://developer.apple.com/swift/blog/?id=20)]
I would think the easiest way to evaluate Swift code 'on' a iOS device would be to send it to a Mac, but as said, I don't think this app evaluates Swift code.