Contact person: Android App With In-App Purchases -- 2

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Location: Kolkata, India

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"I need a clean, well-documented Android Studio project that demonstrates a fully functional in-app purchase flow. The interface can be minimal; the priority is native integration with Google Play Billing so I can later drop the code into a larger product.

Please build in Kotlin (Java is fine if that is faster for you), target the current SDK, and rely on the latest Google Play Billing Library. The code must cover one-time, consumable, and subscription products, handle pending transactions, acknowledgements, and common error states, then return the purchase token for server-side verification.

Deliverables
• Complete Android Studio project, ready to compile
• Demo APK showing purchases working in sandbox mode
• Short README explaining how to add product IDs, test, and release

I will run the APK with my own license tester accounts; payment is released once purchases succeed and the code compiles without warnings." (client-provided description)