Added new app idea: Expense Splitter – Smart Group Expense Tracker

Projects/2-Intermediate/ExpenseSplitter.md

@@ -0,0 +1,57 @@
+# Expense Splitter – Smart Group Expense Tracker
+
+**Tier:** 2-Intermediate
+
+An app that helps groups (friends, roommates, colleagues) split shared expenses easily and track who owes whom.  
+Perfect for trips, parties, or shared living arrangements where managing expenses manually becomes confusing.
+
+## User Stories
+
+- [ ] User can create a new group (e.g., "Goa Trip" or "Flatmates")
+- [ ] User can add members to a group
+- [ ] User can add expenses with:
+  - Amount
+  - Description
+  - Who paid
+  - How it should be split (equally or custom)
+- [ ] App automatically calculates balances (who owes whom)
+- [ ] User can view a summary screen showing each member’s balance
+- [ ] User can mark an expense as settled
+
+## Bonus Features
+
+- [ ] Split expenses unevenly using custom percentages
+- [ ] Currency selector for international trips
+- [ ] Export summary as PDF or CSV
+- [ ] Group chat or comments per expense
+- [ ] Login & sync using Firebase or Supabase
+- [ ] Offline mode (store data in localStorage/IndexedDB)
+- [ ] Visual charts showing spending per person or category
+
+## Example Scenario
+
+A group of 5 friends goes on a trip.  
+- Riya pays ₹2,000 for hotel  
+- Aviraj pays ₹1,000 for food  
+The app calculates everyone’s share (₹600 each) and shows:  
+> “Aviraj owes Riya ₹400”
+
+Once payment is made, the expense can be marked as **settled**.
+
+## Useful Links & Resources
+
+- [Splitwise (Inspiration)](https://www.splitwise.com/)
+- [React Hooks – useState & useEffect](https://react.dev/learn/state-a-components-memory)
+- [Firebase Authentication Docs](https://firebase.google.com/docs/auth)
+- [Chart.js Documentation](https://www.chartjs.org/docs/latest/)
+
+## Possible Tech Stack
+
+- **Frontend:** React + Tailwind CSS (or Flutter for mobile)
+- **State Management:** Redux Toolkit / Zustand
+- **Backend:** Node.js + Express + MongoDB
+- **Auth:** Firebase / Clerk
+- **Charts:** Recharts or Chart.js
+
+---
+