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.