Expense Tracker
Mobile expense tracking app with wallet management, authentication, real-time sync, transaction history, and visual spending insights.
At a Glance
Problem
How do you keep balances accurate in real-time while making expense logging fast and intuitive on mobile?
Approach
Implemented an Expo React Native app backed by Firebase for authentication and live data sync. Structured wallet, transaction, and analytics screens for quick daily usage.
What it shows
Shipped mobile-first app with Firebase real-time sync and clean UX for daily usage
What I Was Solving
Create a lightweight mobile finance app that keeps balances accurate in real time while making income/expense logging fast and intuitive.
How I Approached It
Implemented an Expo React Native app backed by Firebase for authentication and live data sync. Structured wallet, transaction, and analytics screens for quick daily usage.
What This Includes
Wallet creation and balance management
Income and expense transaction logging
Authentication and profile management
Searchable transaction history
Visual statistics for spending trends
Real-time synchronization with Firebase
System Overview
An Expo React Native client writes and reads wallet/transaction data through Firebase services. Firebase Authentication secures sessions, Firestore syncs data in real time, and cloud functions can support derived analytics workflows.
Data Model
The expense tracker stores users, wallets, and transactions in a Firebase-backed model that supports fast sync and easy filtering by wallet, date, and transaction type.
User Flow
A user signs in, creates a wallet, records income or expense transactions, searches history, and reviews spending trends through charts and summaries.
Background Flow
Each transaction writes through Firebase, updates wallet totals, recalculates category stats, and syncs changes across devices without manual refresh.
What It Demonstrates
Built a complete personal finance workflow for mobile users
Enabled real-time updates for wallet and transaction history
Improved usability with search and visual stats
Maintained a clean TypeScript-first codebase for scalability
Screenshots
Interested in the work?
If you want to see the code, discuss trade-offs, or understand how I approached the project, I’m happy to talk.
Get in Touch