Split expenses, not friendships
The simplest way to track shared expenses with friends, roommates, or travel groups. No signup required.
Everything you need, nothing you don't
Built with simplicity and usability in mind. Start tracking expenses in seconds.
Quick Add Expenses
Add expenses with a single tap. Smart suggestions and keyboard shortcuts make tracking effortless.
Fair Splitting
Automatically calculate who owes what. Split equally or customize shares for each person.
Real-time Sync
Everyone sees updates instantly. No refresh needed. Built with modern real-time technology.
Private & Secure
Your data is yours. Unique room links keep your expenses private. No account needed.
Works Offline
Install as a PWA and use even without internet. Perfect for trips abroad or spotty connections.
Easy Sharing
Share your room with a simple link. Works on any device, no app download required.
See it in action
A beautiful interface designed for speed and clarity
Track expenses in real-time
Quick expense entry
Clear balance overview
Ready to simplify your group expenses?
Join thousands of friends, roommates, and travelers who trust Coaster to keep their finances fair and transparent.
Get Started for FreeNo credit card required • No signup needed • Start in seconds