I need a comprehensive mobile app for my Karate academy, to be developed for both iOS and Android platforms. The app's primary feature will be student registration, but it should also include a suite of additional features: Essential Features: - Student registration Additional Features: - Payment integration - Notification system - User profiles - Recurring invoicing - Membership and subscriptions management - Auto payment reminders via SMS, WhatsApp, and Email - Automation - Events management - Graduation tracking - Belt exam records - Attendance records - Student private portal Ideal candidates should have: - Proven experience in developing mobile apps for both iOS and Android platforms - Strong background in integrating payment systems - Familiarity with notification systems and user profile management - Experience in building automation features within mobile apps - Knowledge in event management and tracking systems - Strong UI/UX design skills to ensure a user-friendly interface Please provide examples of your previous work, particularly any similar projects you have completed.