iOS App Developer Needed for Video-Based Learning App (Similar to MasterClass)

I'm looking for an iOS app developer to create a sleek, minimalist learning app featuring embedded videos and a structured chapter-based navigation, similar to the MasterClass app. The app should provide a seamless, distraction-free user experience with a focus on high-quality video playback (from YouTube, Vimeo etc.) and intuitive navigation.

Key Features:
- Clean, minimalist UI/UX for a smooth user experience.
- Embedded video player with seamless playback.
- Chapter-based structure for easy navigation through content.
- Offline viewing capability (preferred but optional).
- Bookmarking or progress tracking for users (registration, login, etc.)

Requirements:
- Proven experience developing iOS apps, preferably in education or entertainment.
- Strong grasp of minimalist design and user-friendly interfaces.
- Experience with video integration (AVPlayer, streaming, or offline playback solutions).
- Ability to implement efficient content organization and navigation.
- Prior experience developing similar apps and a portfolio showcasing minimalist design work will be highly regarded. Please provide examples of your previous work when submitting your bid.