I am a back-end developer but I found this tool very helpful if I need to develop any iphone app in the future. Great work! I am also planning to develop some

I am a back-end developer but I found this tool very helpful if I need to develop any iphone app in the future. Great work! I am also planning to develop some rails app and thinking if I should be using spinejs or not. Could you give some detail as how long it took to develop this app? How big is the team? Thanks.