The Ultimate
Offline Companion
for Samui, Phangan & Tao.
Explore the islands with zero roaming fees. Maps, ferries, currency converter and Somchai, your smart pocket guide — 100% offline.
Conrad Koh Samui
Koh Samui, Thailand
Clinging to the lush cliffs of Taling Ngam, on the southwestern tip of the island, the Conrad Koh Samui is a true sanctuary suspended between sky and sea. This... Read more...
Accommodation
Be the first to explore offline.
310+ Places
Samui, Phangan & Tao
100% Offline
No SIM or roaming required
Somchai
Your Local Friend
0฿ Fees
Free offline download
The Rollout Plan
Phase 1 : Koh Samui
The ultimate offline experience focused strictly on Samui's best-kept secrets.
Phase 2 : Phangan & Tao
Expanding the map to the neighboring islands with the same level of detail.
* Koh Phangan & Koh Tao will be added in this upcoming update.
Everything You Need for
The 3 Islands.
Engineered specifically for travelers exploring Koh Samui, Koh Phangan, and Koh Tao with zero internet connection.
Satellite Offline Map
Full vector map of Koh Samui, Koh Phangan, and Koh Tao stored locally. View viewpoints, beaches, and waterfalls without mobile data.
Inter-Island Ferries
Instant booking and live timetable consultation for speedboats and ferries connecting Samui, Phangan, and Koh Tao.
Your local Concierge Somchai
Ask any question to Somchai. Get personalized itineraries and custom advice in seconds.
Scooter & Hotel Booking
Rent verified scooters via Skoot and book top hotels on Samui, Phangan & Koh Tao through Agoda integration.
Multi-Currency Converter
Convert prices in Thai Baht (THB) to EUR, GBP, or RUB instantly. Live rates fetched online and cached for offline market use.
Travel Planner & Budget
Plan your daily agenda and track your trip expenses with our built-in budget and itinerary management tools.
Favorites & Custom Trips
Save your favorite locations, customize your profile, and build your own roadtrips directly on the interactive map.
Thai Lexicon & Essentials
Access essential Thai phrases, eSIM guides, and travel documents like TDAC right from the app.
Meet Somchai. Your Local Friend.
Available 24/7 to craft your perfect itinerary, find secret spots, and answer any questions. It’s like having a Thai friend in your pocket.
Chat with Somchai
Online • Ready to help
Instant Multi-Currency Converter.
At night markets or restaurants in Koh Samui, Koh Phangan & Koh Tao, calculate exact prices in Euros, British Pounds, or Russian Rubles in 1 second. Exchange rates are fetched live and cached for 100% offline usage.
Currency Converter
Live Rates
EQUIVALENT IN
1 THB ≈ 0.026 €
26.00
€
From Koh Samui, with love.
Hi, I'm Anthony. This summer, I packed up my life in Belgium to settle permanently in Koh Samui with my Thai partner, Nan. Living here, we quickly realized the biggest frustration for travelers: losing signal just when you need it most. That's why we built KohSiam — a tool we actually use every day to explore without boundaries.
Frequently Asked Questions.
Download KohSiam Today.
Join the early access waitlist to get your hands on the ultimate offline guide.
Be the first to explore offline.