The moment that broke us, one year ago
Anyone who loves travel knows this scene.
Your calendar has the schedule. Your notes app has the packing list. A spreadsheet holds the budget. The flight PDF is buried somewhere in email. The hotel confirmation is in a group chat. And the tour vouchers are... somewhere.
The problem isn't that any of these things are hard to manage on their own. It's what happens when you're at the airport and need to show your boarding pass, or standing at the hotel front desk needing your booking reference, or you're somewhere with no WiFi and just want to check tomorrow's plan — and none of it is in one place.
Tripop was built to solve exactly that. And in April 2026, it launched simultaneously on iOS, Android, and web.
Why another travel app?
There are plenty of travel apps already. Hotel booking apps, flight comparison apps, budget trackers, calendar tools.
But the actual work of preparing for a trip — building an itinerary, sharing it with travel companions, collecting vouchers, converting currencies, checking tomorrow's plan from the plane — doesn't happen smoothly in any single one of them.
Two problems stood out above the rest.
First: AI has been almost entirely absent from trip planning. Seventeen pages of PDF vouchers from a travel agency. Itinerary screenshots shared in a group chat. A natural-language request like "plan me a 5-day Hawaii honeymoon" — none of the existing apps could take inputs like these and turn them into a structured itinerary without significant manual work.
Second: travel apps fail exactly when you need them most. Airplane mode. International roaming dropout. Basement hotel restaurant. A rural corner of Southeast Asia with no signal. Most travel apps show a blank screen without network access — useless at the very moment you need them.
We wanted to build an app that solved both problems head-on.
Tripop's two killer features
1. AI travel management — any input becomes an itinerary
Tripop's AI handles four kinds of input:
- Photo of a document — snap a printed itinerary from your travel agent
- Photo from your camera roll — an itinerary screenshot shared in a chat
- PDF file — flight e-ticket, hotel booking confirmation, tour voucher
- Plain text — "Plan me a 5-night Oahu honeymoon, beach focus"
Whatever you give it, the AI produces a day-by-day itinerary with time-stamped events, auto-registered vouchers, a checklist, and itinerary-voucher links — all in one pass. Inside each event card, you can also pull up AI tips across five categories: transportation, restaurants, weather, local advisories, and travel hacks.
2. Offline-first design — works on the plane, works abroad
Sync once before you leave, and your itinerary, vouchers, and expense log all work without a network connection.
- Check tomorrow's schedule mid-flight — OK
- Show your hotel voucher at the front desk with no WiFi — OK
- Log an expense with no data connection — OK (cached exchange rates)
- Review maps of places you've already opened — OK (cached)
When connectivity returns, any changes sync automatically to the server. Only two features require internet: the AI and live exchange rates.
Everything else you need — budget tracker, voucher wallet, companion sharing
Beyond the two headline features, Tripop includes everything you need in one place:
- Multi-currency expense tracker — snap a receipt and the AI fills in the amount, currency, and category automatically. Set your display currency to your home currency and every foreign charge shows up converted.
- Voucher wallet — six categories: Flight, Hotel, Tour, Transport, Visa/Entry, Insurance. Open any voucher directly from its linked itinerary card, offline included.
- Companion invite — invite by email; companions edit or view the same trip in real time, with separate editor/viewer permissions. Family members without the app can access the same trip from a browser at tripop.app/web.
- Checklist, D-Day counter, AI gap analysis — missing transport legs, incomplete vouchers, or unbooked accommodation? The AI flags them before departure.
How it's built
The technology stack is fairly conventional in retrospect:
- Mobile: React Native (Expo 52), Zustand + MMKV (offline storage), NativeWind
- Server: Next.js, Supabase (PostgreSQL), JWT auth
- AI: Google Gemini 2.5 Flash
- Languages: Korean, English, Japanese, Chinese — four languages from day one
The genuinely hard part wasn't the stack — it was offline/online sync. When two companions edit the same trip simultaneously, one from a plane and one from the hotel, how do you handle conflicts? We landed on a simple model: every mutation is queued with a 3-second debounce, pushed then pulled in order, with the server as the source of truth. If something goes wrong, a manual re-sync is one tap away under Trip Options → Sync.
The other deliberate call was no login required to start. Forced registration is annoying. Itinerary, budget, vouchers, and checklists all work without an account. Only AI generation, sync, and companion sharing need a login — and new accounts get free AI credits automatically.
Download — iOS, Android, web
Tripop is free on all three platforms:
- iOS — Download on the App Store
- Android — Download on Google Play
- Web — tripop.app/web (no install needed)
Search "Tripop" in the App Store or Play Store to find it. New accounts come with free AI credits — worth using to generate your first trip and see how the whole thing fits together.
If you want a full walkthrough, the 5-minute feature guide covers every feature step by step using a sample 5-night Hawaii honeymoon itinerary.
What's next
Launch is the starting line, not the finish. Coming up:
- Travel community — share itineraries and tips from cities you've visited with other travelers (launching after UGC policy finalization)
- Widget and Watch app — iOS home screen widget, Apple Watch itinerary view
- Card transaction sync — automatic expense entry via card integration
- AI trip comparison — "Hawaii vs. Guam for 5 nights — which fits us better?"
If you're a traveler, give it a try and send us feedback. This is a solo-developer project, so every piece of user input goes directly into the next update.
The excitement of a trip starts when you begin planning it. Travel with Tripop. ✈️