Sorry I am not much help in coding, but came across that looking for something else and I thought, heck it can't hurt to try.
Did find a few others as well:
http://www.apportable.com/
https://www.madewithmarmalade.com/blog/ios-android-7-steps
Although I also ran across this: "even if you convert the iOS app, some of the UI and design patterns are different when comparing an iOS App to an Android App (for example iOS uses tableviews and the cells can have disclosure indicators while on Android you would need to use a list view and not use a disclosure indicator since it goes against the design patterns for Android). I would suggest taking a look at the Android documentation, specifically the recommended design patterns as that will help give you an idea of how much you would need to change to make your code work for Android."
So it could all just be a pipe dream at having a "simple" converter.