Android Boyfriend Rental App

I am building a simple yet polished Android application that lets users book time with a “rental boyfriend” right from their phones. The first release is deliberately slim: the core flow should take a customer from selecting a package, through a secure checkout, to a confirmation screen—no social features or in-app chat at this stage. What I need from you is an Android-native build (Kotlin or Java) with fully tested payment integration. I am open to Stripe, Razorpay, PayPal, or another gateway you prefer, as long as it supports one-time charges and handles common payment errors gracefully. A clean, intuitive UI, basic booking logic, and a small admin settings area for toggling prices or availability will round out the MVP. To wrap things up smoothly, please provide: • Release-ready APK plus a debug build for testing • Complete Android Studio project with clear comments • Short setup guide explaining how to switch the payment keys and push a new release If you have live examples of past Android payment work, feel free to mention them when you respond. Looking forward to collaborating on this quick, focused launch.