I’m building a complete digital-health backbone that lets clinicians and patients connect seamlessly by phone or tablet while handling all billing inside the same experience. The mobile app must launch on both iOS and Android from a single codebase if possible, giving users identical functionality on either platform. Core communication features include: • real-time video consultations that feel as smooth as popular conferencing tools, • secure text chat for follow-up questions, and • file sharing so results, images, or prescriptions can move instantly between parties. For payments, I want a proven third-party gateway (Stripe, PayPal, or a similarly trusted provider) wired directly into the app. Patients should be able to settle consultation fees in-app without being bounced to a browser, and transactions need to appear in a clinician dashboard for easy reconciliation. Your deliverable is a production-ready mobile application plus any server components needed to manage user accounts, appointment scheduling, encrypted messaging, and the payment flow. Clean, well-commented code, deployment instructions, and a brief hand-over session will round off the engagement. If you’ve shipped HIPAA-compliant or GDPR-ready health products before, let’s talk: I’m aiming for the same level of security and reliability here.