Functional requirements of Expense Tracker with non-functional

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Functional Requirements

1. User Authentication and Authorization
   • Allow users to create accounts, log in, and manage their profiles.
   • Implement role-based access if multiple users share an account (e.g., family members, business partners).
2. Expense Recording
   • Allow users to input and categorize expenses, including details such as amount, date, and description.
   • Support various expense categories (e.g., groceries, utilities, entertainment).
3. Income Tracking
   • Record and categorize income sources, including salary, freelance work, investments, etc.
   • Track and display income over time.
4. Budget Management
   • Enable users to set and manage budgets for different expense categories.
   • Track actual spending against budgeted amounts and alert users when budgets are exceeded.
5. Recurring Expenses and Income
   • Support the creation of recurring expenses and income entries (e.g., monthly subscriptions, rent).
   • Automate the recording of recurring transactions based on user-defined intervals.
6. Reporting and Analytics
   • Generate reports on spending patterns, income vs. expenses, and budget adherence.
   • Provide visualizations (e.g., graphs, charts) to help users understand their financial situation.
7. Expense Categories and Tags
   • Allow users to create and manage custom categories and tags for expenses.
   • Provide default categories for common expense types.
8. Transaction Search and Filtering
   • Provide functionality to search for and filter transactions based on criteria such as date, category, and amount.
   • Enable users to view transaction history and specific reports.
9. Synchronization and Backup
   • Sync data across multiple devices (e.g., mobile, desktop) if the user accesses the tracker from different platforms.
   • Offer backup options to protect data from loss.
10. Currency and Localization
    • Support multiple currencies and allow users to set their preferred currency.
    • Provide localization features such as date and number formats according to regional settings.
11. Notifications and Alerts
    • Send notifications for upcoming bill payments, budget thresholds, and other important financial reminders.
    • Alert users about unusual spending patterns or overspending.
12. Integration with Bank Accounts
    • Integrate with bank accounts or financial institutions for automatic transaction import and reconciliation (if applicable).
    • Ensure secure handling of financial data during integration.
13. Export and Import
    • Allow users to export their expense data to common formats (e.g., CSV, PDF).
    • Provide functionality for importing data from other financial management tools.

Non-Functional Requirements

1. Performance
   • Ensure quick response times for entering, searching, and retrieving expense data.
   • Handle high volumes of transactions efficiently.
2. Scalability
   • Support the addition of new features, categories, and users as the system grows.
   • Scale to accommodate increasing amounts of transaction data.
3. Reliability
   • Ensure high system availability and minimal downtime.
   • Implement backup and recovery procedures to protect user data.
4. Security
   • Protect sensitive financial data with encryption and secure access controls.
   • Ensure compliance with data protection regulations (e.g., GDPR, CCPA).
5. Usability
   • Provide an intuitive and user-friendly interface for entering and managing expenses.
   • Ensure ease of navigation and accessibility features.
6. Maintainability
   • Design the system for easy updates, maintenance, and troubleshooting.
   • Provide clear documentation for system administrators and developers.
7. Compatibility
   • Ensure compatibility with various devices and operating systems (e.g., mobile, desktop).
   • Support integration with third-party financial tools if needed.
8. Data Integrity
   • Ensure accuracy and consistency of financial data across the system.
   • Implement validation checks and error-handling mechanisms.
9. Support and Documentation
   • Provide user manuals, help guides, and support resources for troubleshooting.
   • Offer technical support for system issues and maintenance.
10. Auditability
    • Maintain logs of user actions and system changes for auditing purposes.
    • Provide audit trails for expense entries, budget adjustments, and data synchronization.