Finance & Fintech

Expense Tracker

Build a personal expense tracking app to log spending, categorize transactions, and visualize trends.

Build a personal expense tracker:

Expense logging:
- Add expenses with amount, category, date, description, and payment method
- Quick-add with just amount and category for daily logging
- Recurring expenses (rent, subscriptions, utilities)
- Upload receipt photos

Categories:
- Default categories: food, transport, entertainment, health, shopping, bills, education
- Custom categories with icons and colors
- Sub-categories for detailed tracking

Budgeting:
- Set monthly budgets per category
- Budget vs. actual spending with visual progress bars
- Over-budget alerts and notifications
- Rollover unused budget to next month (optional)

Analytics:
- Monthly spending breakdown by category (pie chart)
- Spending trends over time (line chart)
- Daily, weekly, monthly, and yearly views
- Compare spending month-over-month
- Most expensive categories and biggest individual expenses

Export:
- Export transactions to CSV
- Monthly summary reports

The app should have user authentication. All data is private per user.

Visual style:
- Color palette: deep navy (#1a1a2e) background with emerald green (#00C9A7) accents and white text
- Dark mode by default with clean card-based layout and category pie charts
- Sharp, modern sans-serif typography
- Fintech aesthetic — minimal and focused, prioritize data clarity over decoration

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