android app

I am looking to build an Android app with a focus on productivity. I do not have a specific design in mind yet, and require assistance in that regard. The app should have basic features with some customization options. This could include tasks and/or reminders, calendars for planning, integration with other apps.

Table of Contents:

First chapter - description of the software and its features
The purpose of the project, the description of the options and the requirements for running the software

Chapter two - a guide to develop
The departments in the project
Application essence and logic diagram
Running a session in the application screens
Description of department relationships by UML diagram
Documentation of departments and operations with the help of JAVADOC
Description of the organization saved in FireBase
Using foundation stones
the activities
The intentions
The dialogue
the menu
The service component
The BroadcastReciever component

Chapter three - personal summary
Further developments
Reflection on the project process
List of sources of information