So, let me see if I got this right ... you had a three month project which is ending soon and you haven't written any code, or given us any idea what the UI, methodology, framework, or even language might be and you expect us to give you information on how to start coding the app?
We can't give you any specific help, we just don't have anywhere near enough information - and if you've been working solidly on it for the best part of three months then you have a lot more work done than we have time to read!
So all we can tell you is start here:
How to Write Code to Solve a Problem, A Beginner's Guide[
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