Cross-Platform Personal Development App

I need an app developed for both iOS and Android platforms that features pre-recorded personal development videos. The app should include user authentication with login and registration.

Key Requirements:
- Pre-recorded personal development videos
- User authentication (login and registration)
- Available on both iOS and Android

Ideal Skills and Experience:
- Experience in mobile app development for both iOS and Android
- Knowledge in implementing secure user authentication
- Background in designing user-friendly interfaces
- Familiarity with video integration in mobile apps

Please provide samples of similar work done.