Hello - I'm looking for an experienced mobile app and website developer to create a professional certification revision app & website please. The platforms would focus on multiple-choice questions and the app will need to be developed for both iOS and Android platforms. Key requirements include: - User authentication with email login - Multiple-choice questions focused on professional certification topics - Animated answer feedback (correct/incorrect & correct answer explanation) - Score tracking and results screen - Optionality for users when selecting a) which competencies to be assessed on, and b) what level to be assessed to (levels 1-3) Ideal skills and experience: - Proficiency in cross-platform mobile app and website development - Experience with secure user authentication systems - Knowledge of professional certification content is a plus Please provide examples of similar work done, if available. Thank you.