Educational Android App Development

I'm seeking a skilled Android app developer to create an educational application aimed at students. The app's primary purpose is to facilitate learning through interactive and engaging features.

Key Features:
- Interactive quizzes: The app should incorporate quizzes to test students' understanding and keep them engaged.
- Study materials download: It should allow students to download study materials for offline use.
- Progress tracking: The app should have a feature that enables students to track their learning progress over time.

Ideal Skills and Experience:
- Proven experience in Android app development, particularly in the educational sector.
- Strong skills in creating interactive features within an app.
- Experience with implementing download and tracking functionalities.
- Good understanding of the needs and preferences of students.