I'm looking for a skilled mobile app developer to create a cross-platform billing and recharge application for both iOS and Android. The app should include: - User registration and login - Billing management - Recharge functionality API access will be provided on my end. Ideal candidates should have: - Experience in mobile app development for both iOS and Android - Strong understanding of API integration - Prior experience with billing and financial management apps - Proficiency in user authentication and secure login systems Please ensure the app supports only one language. Looking forward to your proposals!