I'm happy to tell you I just finished the first version of IGJavaScriptConsole, a JavaScript/Ruby REPL for your Objective-C apps! REPL stands for Read-Eval-Print-Loop. See it in live below: Why? Since iOS 7 shipped with JavaScriptCore, I always want to run Ruby on it with Opal. While it is totally possible to write Opal app as is, its getting harder when the Ruby classes getting interact with nat