I need a faithful iOS clone of an existing fitness application, matching both its look and its behaviour end-to-end. Every screen, animation, and interaction should feel identical to the original, while still being written in clean, well-structured Swift that I can easily maintain. Core feature set – A workout-routine library where users can browse, start, pause, and resume guided sessions. – Persistent progress tracking so personal stats, streaks, and achievements update in real time across launches. Integrations The build must allow users to share completed workouts or milestones straight to their preferred social channels and accept in-app purchases or subscriptions through a secure, PCI-compliant payment gateway. Key expectations • Pixel-perfect UI parity with the reference app, adapted for the latest iPhone and iPad sizes. • Robust architecture (MVVM, Combine or similar) with unit tests covering critical logic. • Clean, human-readable code with clear comments. • Delivery via TestFlight plus full Xcode project so I can inspect, run, and extend the code locally. Please base your timeline on building a production-ready clone, including QA and any App Store compliance tweaks.