Android Reiki Healing Center App Development

I want to give my Reiki Healing clients a simple, fully-featured Android experience they can download straight from Google Play. After a quick login, users must be able to: • book a treatment in an available time slot, • chat with me in real time, • pay instantly through UPI, • browse all Reiki Healing services, • check their profile and past sessions, • receive push notifications for reminders and promotions. On the back end I need a straightforward admin panel where I can set or block appointment slots, reply to chat messages, track payments, and push notifications or content updates. A lightweight marketing website that mirrors the app (service list, contact form, Play Store link) should be included so new visitors can learn about us before installing. Deliverables 1. Production-ready Android app (APK + Play Store listing) built in any modern stack you are comfortable with—Flutter, Kotlin, React Native, or similar—as long as performance is smooth. 2. Admin panel with secure login and the controls mentioned above. 3. Integrated UPI payment gateway that settles directly to my account. 4. Basic responsive website hosted on my domain. 5. Complete source code, publishing support, and a brief hand-off guide. Please plan the work so it stays within roughly the ₹10,000 overall budget: break the build into clear milestones (app core, payments & chat, admin panel, website, Play Store publication) and I will release payment as each is accepted.