I'm fat. I'm not as fat as I used to be, but I'm more likely to get rich than I am to get skinny (and keep your unsolicited advice to yourself).
No matter how assiduous I am about grooming, I will still be fat. No matter how well I dress, I will still be fat. Not being a slob doesn't outweigh being fat.
Your app isn't going to help me. It will do nothing but collect my data for you to sell to DirectXL and other retailers catering to fat men, and they probably already have me on file.