Build Mobile App for given figma design

I have an app that is already built. Apps are build in native for ios and android and backend is written in node JS. The backend is in node JS and it is up and running. I need someone to build the app for me using the design provided. https://www.figma.com/design/asHXwT5Qq8pcuE7JpYsTKy/KidAdvisor?node-id=2109-7505&p=f Please give me your price, technology and price. Also give me reference to apps you've developed. Once this is done, we will sign a contract for on-going support and maintenance and enhancements. We are looking for a long term relationship.