Node.js for iOS
The best code is the code you already wrote. Use the code that reliably runs on your servers and your frontend to power your next great iOS 7 app, just like that.
Tons of modules
In tens of thousands of modules there's a module for nearly everything you can imagine. The Node.js-compatible API allows you to use virtually every module available through npm.
Node.app provides the familiar Node.js API which is well documented and extremely easy to use.
Your customers won't even notice you aren't developing native, unless you tell them. With Node.app you are using the same fast system functions just as with normal iOS code.