01
Real-time everything
Firestore onSnapshot listeners stream every change live to every member, with no refresh. A new expense, a chat message, an itinerary edit: it appears for everyone instantly.
Case Study
KromTrip
A real-time group travel management app.
◧Dashboard screenshot
images/kromtrip/dashboard.png
images/kromtrip/dashboard.png
Overview
Coordinating a group trip is chaos. The itinerary lives in one chat, expenses in a spreadsheet, and who-paid-what in everyone's head. KromTrip pulls it all into one shared, real-time workspace where every member sees the same live plan, budget, and balances. Build an itinerary together, split expenses with automatic settle-up, chat, and keep documents and packing lists in sync, all updating instantly across the group.
Built with
Architecture
Engineered to scale.
02
Per-trip subcollection model
Each trip owns its own itinerary / members / expenses / chat / packing / notes / documents / activity collections, so data stays scoped, secure, and scales cleanly.
03
Multi-currency money layer
Expense splitting with automatic settle-up and live currency conversion, so balances are correct whether the group spends in USD, EUR, or THB.
Features
One hub, eight modules.
Dashboard
Live stats, trip cards, and an activity feed.
Itinerary
Day-by-day planning with typed activities.
Expenses
Budget tracking, splitting, and settle-up.
Members
Invite by email, roles, live per-person balances.
Group Chat
Real-time messaging per trip.
Packing & Notes
Shared lists and notes the whole group edits.
Documents
Keep tickets and bookings in one place.
Explore
Discover destinations to add to the plan.
Screens
A look inside.
◧Itinerary
images/kromtrip/itinerary.png
images/kromtrip/itinerary.png
◧Expenses
images/kromtrip/expenses.png
images/kromtrip/expenses.png
◧Members
images/kromtrip/members.png
images/kromtrip/members.png
◧Chat
images/kromtrip/chat.png
images/kromtrip/chat.png
What I took from it
KromTrip pushed me past coursework into real product engineering: designing a real-time data model that scales, securing a client-only Firebase app with proper rules, and reducing friction across eight tightly-connected modules. It's not a demo. It's a working product with authentication, a live database, and 11 screens, built and shipped end to end.