Native iPhone App for Connected Hardware

I already have the cloud stack (Supabase), full REST + realtime API docs, a working reference web app, UX screenshots, and real test devices ready; what I need now is the native iOS experience that will ship with our product launch across Europe... (Budget: €8 - €9 EUR, Jobs: API Development, iOS Development, iPad, iPhone, Mobile App Development, Mobile App Testing, Objective C, REST API, Swift, SwiftUI)