Software for Diabetes Management

Hi all,
I am a Type-1 Diabetic doing my Computer Science Engineering course. I am interested in creating a Diabetes Management Software which is 100% freeware with features to match any commercial offering. Can I know what all features will be nice to have in such a software?

Check out my color coded chart. Go to My Page. It is not a software but a color coded printout. Part of designing is getting all info for ideas. Don’t hesitate to ask me questions. Go for it and Good Luck.