Juding Criteria

Usability - User Experience and UI

Its about how easily the application is comprehensible to the user. It should be easy for the user to become familiar with and competent in using the user interface on the first contact with the application.

Innovation

How original is the idea, how deeper is the problem solving, the methods used to solve using various hacks will get more points.

Impact

This is the size of the market, applicability or a need for solving the problem, how many are affected by the problem for which you are solving.

Technical Difficulty/differentiation

How hard it is for others to engineer your idea, the technologies you have used to make it difficult, or the way you have engineered it can be a winning criteria.

Pitch/Presentation

If you can build it you also should be able to pitch it. Your presentation skills, communication, delivery of your product's solution will be very important too.