Hi,
I have read your all description and I totally understand your requirement
I have experience of 5 years in iOS and React Native App Development. I have worked on 10+ long term projects. So, this would be an easy task for me. I have worked on tools like POSTMAN for REST APIs and having knowledge in source control tools like GitHub, bitbucket and gitlab etc... and experience with local data storage tool like Core Data, Realm.
Please let me know if you can be available to discuss the project in detail . I will be looking forward to work with you.
Thank you