Expense Tracker app

Here's a detailed plan for the Household Account Book App based on your requirements:

Design Theme

- Theme: Light theme for a clean and modern look.

- Icon/Button Color: Use a single color, such as teal, for all icons and buttons to maintain consistency.

- Button Shape: Rounded corners with a radius of 8dp for a soft and approachable appearance.

Home (Main) Screen

1. View Household Expenses:

  - Display a summary of total expenses at the top of the screen.

  - Below the summary, show a breakdown of expenses by categories A, B, and C.

  - Each category will have a progress bar indicating the percentage of the budget spent.

2. Monthly View:

  - A horizontal swipe gesture allows users to flip through months.

  - Display the current month prominently at the top.

  - Include navigation arrows on either side of the month for additional navigation options.

3. Navigation:

  - A bottom navigation bar with icons for Home, Calendar, Statistics, and Budgeting screens.

Calendar Screen

1. Calendar Format:

  - Display a monthly calendar grid.

  - Each date cell shows the total spending for that day.

  - If a note is present, an icon (e.g., a small pencil) appears in the corner of the date cell.

2. Date Selection:

  - Tapping a date opens a detailed view of expenses for that day.

  - Users cannot select future dates; disable these dates in the calendar.

3. Month Navigation:

  - Swiping left or right changes the month.

  - Selecting a date from the previous month automatically navigates to that month.

Statistics Screen

1. Time Period Selection:

  - Default view is the current month.

  - A dropdown menu allows users to select different time periods (e.g., last 3 months, custom range).

2. Spending History Visualization:

  - A circular chart (pie chart) displays the distribution of spending across categories A, B, and C.

  - Below the chart, a list shows detailed statistics, including percentages and total amounts.

3. Detailed View:

  - Tapping on a category in the list or chart opens a detailed breakdown of expenses within that category.

Budgeting Screen

1. Category Selection:

  - Buttons for categories A, B, and C at the top of the screen.

  - Selecting a category filters the input fields accordingly.

2. Input Tabs:

  - Date Tab: Opens a calendar widget for date selection.

  - Category Tab: Dropdown menu to select sub-categories within A, B, or C.

  - Amount Tab: Numeric keyboard for entering the expense amount.

  - Content Tab: Text field for entering a description of the expense.

  - Notes Tab: Text area for additional notes.

  - Photos Tab: Option to attach photos from the gallery or take a new photo.

3. Customizable Input Methods:

  - Each tab provides an intuitive input method tailored to the data type (e.g., numeric keyboard for amounts).

Additional Features

- Responsive Layouts: Ensure the app is responsive and works well on various screen sizes.

- Form Validation: Validate inputs to ensure data integrity (e.g., non-negative amounts, valid dates).

- Back Navigation: Standard back navigation to return to the previous screen.

- User Feedback: Provide visual feedback for actions (e.g., saving an entry, switching screens).

This plan outlines the key features and design elements needed to implement the Household Account Book App, ensuring a user-friendly and functional experience