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We need to develop mobile application for iOS Android with server side.
Client application should start and run the same on Android and iOS.
Require no additional libraries (such as Air, etc.) and be small size. In my opinion the best would be to use PhoneGap for the client side.
Server part should be optimized for a large number of requests. In my opinion the best would be to use node.js + mysql
I open for you suggestions about the project.
More details in attach.