Professional Educational iOS & Android App

I require a comprehensive educational app designed for both iOS and Android platforms. The app should be built with a professional and modern design style, and include the following key features:

1. Learning Dashboard
- A personalized progress tracker that shows users their completed and pending lessons.

2. Video Lessons
- An organized section for pre-recorded video lectures sorted by subject.

3. Practice Questions & Quizzes
- A large question bank with detailed answer explanations.

4. Discussion Forums
- A space for peer-to-peer discussions aiding in doubt resolution.

5. Payment & Subscription Plans
- Integration of a reliable payment gateway (PayPal, Stripe, Razorpay) for seamless transaction experiences.

Ideal skills for this project include:
- Proficiency in app development for iOS and Android.
- Experience in designing professional and modern user interfaces.
- Expertise in integrating various payment gateways.
- Prior work on educational apps would be an added advantage.

I am looking for a freelancer who can deliver a high-quality, user-friendly app with the specified features. Please provide samples of your previous work, particularly any educational apps, with your proposal.