What I do is write the model and bussiness rules in Java, and I use J2ObjC[0] to export it for iOS. The configuration is not pain free, but once set up it has b

What I do is write the model and bussiness rules in Java, and I use J2ObjC[0] to export it for iOS. The configuration is not pain free, but once set up it has been extremelly reliable for me. I don't need to support web, but I hear GWT[1] works well for this. I don't see why JSweet[2] would not also work. [0]http://j2objc.org/ http://j2objc.org/ [1]http://www.gwtproject.org/ http://www.gwtproject.org/ [2]http://www.jsweet.org/ http://www.jsweet.org/