I have used RubyMine when i was developing apps with Rubymotion. It was a little bit rough around the edges back then (oct 2013) but the code completion was alr

I have used RubyMine when i was developing apps with Rubymotion. It was a little bit rough around the edges back then (oct 2013) but the code completion was already quite useful. It looks like they even support debugging from within the ide now.