I'm seeking an experienced mobile app developer to create an EdTech application for both iOS and Android platforms. The app should include: - Progress tracking - Various question formats: MCQs, short answer, matching, etc. Ideal skills and experience: - Proven track record in mobile app development for educational platforms - Strong knowledge of progress tracking systems - Experience with multiple question formats in quizzes and assessments - Proficiency in both iOS and Android development Please provide samples of previous related work and an estimate of the time required.