Android Cooking App Development

I need an Android-first cooking application that ships with a polished, searchable recipe database, a built-in grocery list manager, and an adjustable cooking timer that can run in the background while users browse other screens. For now, those three core features are non-negotiable. I am still weighing whether to let users create and share their own recipes, so I would like the codebase structured in a way that makes adding user-generated content straightforward in a later update (for example, keeping data models and cloud storage hooks modular). Deliverables • Production-ready APK and Play-Store-ready bundle • Clean, well-commented source code (Kotlin or Java inside Android Studio) pushed to a private Git repo • Basic Firebase or Room database setup for recipes, with grocery-list and timer data persisted locally • Brief hand-off document or walkthrough video so I can maintain and extend the app myself Acceptance criteria 1. All three headline features work smoothly on current Android versions down to API 24. 2. UI follows Material 3 guidelines and adapts to phones and small tablets. 3. No crashes or critical lint warnings; all functionalities covered by simple unit or instrumentation tests. 4. Clear separation of concerns in the architecture so that a future “share your own recipe” module can plug in without major refactor. If you have recently shipped similar lifestyle or food apps, please include a link or screen capture when you reply so I can get a feel for your design approach.