iOS App Development from Webapp

I need an iOS app developed using my existing web application. This app should include all functionalities of the web app. This is a Sports Performance Hub for Soccer players. NDA and other legal documents will be required to sign. Most leg work has been completed.

Design requirements:
- The app design should be similar to the web app but adhere to iOS design standards.

Integration:
- The app will need to integrate with third-party APIs. Third Party Integration information has already been received.

Ideal Skills and Experience:
- Proficiency in iOS app development
- Experience in integrating third-party APIs
- Strong understanding of iOS design principles

Please provide examples of similar work done.