I'll create a mobile-friendly finance tracking app that allows users to add income and expenses, view their transaction history, and see a summary of their financial status.

This finance tracking app allows users to:

1. Track Income and Expenses:

   • Add transactions with amount, description, category, and date
   • Categorize transactions as either income or expense
   • View transaction history with filtering and search

2. Dashboard Overview:

   • See financial summary (income, expenses, balance)
   • View recent transactions
   • Toggle between transactions and analytics views

3. Analytics and Visualization:

   • View spending by category in a pie chart
   • See monthly income vs expenses in a bar chart

4. Mobile-Friendly Design:

   • Bottom navigation bar for easy access to key features
   • Responsive layout that works well on all screen sizes

The app uses localStorage to persist data between sessions, so users won't lose their transaction history when they close the browser. You can easily extend this by connecting to a database for a production application.