Create a Weight Loss Tracker for My Membership Site

Hello there. I would like someone to create a weight loss tracker for my membership site. Right now, I use Wordpress with the OptimizePress theme so that will have to stay in place. Second - I use DAP as the membership manager plugin so I would like to keep that in place too. So I'm looking for: 1. My members post their weight loss updates and my site display it to them nicely. 2. Keep track of their weight loss stats. 3. AND keep track of EVERYONE's weight loss stats as a whole.. like our members have lost a total of 4,000 pounds.. And then, post it nicely somewhere in the site. I'm not sure how this should look so I'm hoping YOU have experience with something like this since there are thousands of these types of sites. Thanks!