Android Productivity App Build

I want to create a brand-new productivity app for Android, starting completely from scratch. I have no existing codebase, designs, or technical documents, so I will rely on your guidance to shape the project from concept to a working APK.

Here is what I need:
• An initial discovery call to refine the core idea, target users, and feature list.
• Wireframes or rough screen sketches so we can agree on the user flow before coding begins.
• Android app development (Java or Kotlin) focusing on clean architecture, responsive layouts, and smooth performance on current OS versions.
• Basic productivity features such as task creation, editing, and simple reminders—enough to demonstrate real utility without overcomplicating the first release.
• Simple local data storage; cloud sync can be discussed as a future phase.
• A build I can test on my own device, plus clear instructions for installing and providing feedback.
• Handover of well-commented source code and any design assets once we reach a stable MVP.

I’m happy to review milestones and refine requirements together, but the priority is delivering a functional, polished first version that proves the concept. Let me know your proposed approach, timeline, and any past Android productivity apps you’ve shipped that show you can take an idea from zero to launch.