SplitBills: Fair Expenses Made Simple

💡 Inspiration

Splitting bills after group trips, dinners, or shared expenses is notoriously messy. Existing apps either:

• Overcomplicate with unnecessary features
  
• Lack intuitive interfaces
  
• Don’t handle edge cases (partial payments, debts)
  

We built SplitBills to solve this with:
$$ \text{Fairness} + \text{Simplicity} + \underbrace{\text{Zero Math}}_{\text{Automated}} $$

🛠 How We Built It

Tech Stack:

• Frontend: Expo + React Native (cross-platform)
  
• State: React Context API
  
• Backend: Firebase (Auth/Firestore)
  

Key Features:

1. Smart Splitting:

   • Auto-calculates shares using $$ \frac{\text{Total}}{\text{Members}} $$
     
   • Adjusts for custom percentages (e.g., 60/40 splits)
     

2. Debt Resolution:
   Minimizes transactions via $$ \text{Greedy Algorithm} $$ → Fewer bank transfers!

🧠 Challenges & Learnings

🔮 What’s Next?

• Blockchain Integration: Smart contracts for trustless splits (WIP)
  
• Voice Notes: "Alexa, add $12.50 for coffee to SplitBills!"
  

Built With

• coingekoapi
• node.js
• reactnative
• tailwindcss