Hello , How are you? I've reviewed your project details you shared above and I can design and build an Professional and High Quality application in cross platform for Nutrition clinic management and I have also seen the attached document as per your requirements with complete mobile responsive design. Do you also want to publish the mobile app in app store?
Let's have a talk via chat to finalize the project. I would love to work with you.
We have extensive experience in this field. You can check my portfolio and my client’s feedback via this link,
https://www.freelancer.com/u/kamran2012
Thanks,
kamran