Weight Loss Software

I would like someone who knows about weight loss, to make web based software (users will login via members area) to help them lose weight. It will give FULL details on meal plans, work out plans, and so on. Depending on what the users goals are, the software will give different info. Such as, if the user doesn't eat meat, male, female, if they want to lose 10 pounds, 20, 50, 100? Everything is different, depending on what they want. Also, the software will keep track of their progress. So they can login each day and get meal plans, work out plans, then weight in each week or something and check off each day they do their tasks. Like an online diary of sorts. This will be like a "system". Like 10 min ads or something. Where this software will tell them what they need to do to lose weight. YOU MUST KNOW ABOUT Weight Loss to do this project. For this software to work well for the user, you need to know what your talking about. Also need to make a simple user guide for the software, so people know how to use it,