Android Utility Tool App Development

I'm looking for an experienced Android developer to create a utility tool app. The app should include:

Task Management: Organizing and prioritizing tasks.
File Management: Storing, organizing, and accessing files.
Productivity Tracking: Monitoring and analyzing productivity trends.

I have a general idea for the app but need assistance in finalizing the design.

Ideal skills and experience include:
- Proficiency in Android app development (Java/Kotlin).
- Experience with task and file management functionalities.
- Strong UI/UX design skills to help finalize the app design.
- Familiarity with productivity tracking features and analytics.

Please provide a portfolio showcasing similar projects.