KORAIL+ vs SUM Air
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KORAIL+
This application facilitates the purchase of tickets for the Korea Railroad. It provides a convenient platform for travelers to book their train journeys across the country.
- Purchase train tickets
- Korea Railroad journeys
- Convenient booking platform
- Travel across the country
Read full descriptionHide full description
KORAIL+ is the official mobile app of Korea Railroad Corporation (KORAIL). [Key Features] ■ Home You can check various recommended information including connected transportation services and travel products at a glance, based on the itinerary of your ticket. ■ Ticket Reservation You can easily check train information and quickly reserve your desired train on a simple and intuitive screen. ■ Travel Service Reservation Browse and book a variety of travel products including tourist trains and KORAIL Passes. ■ My Ticket Enjoy a more convenient trip with a ticket list that shows your itinerary at a glance on a ticket screen optimized for train travel. ■ Full Menu A well-organized menu structure helps you to quickly and easily find the functions you need. ■ Language Support Multiple language support makes train reservation easy and convenient for foreigners. [Access Permission Information] · Optional access permission · Location Information: Select a nearby station when searching for a station · Photo: Save and share tickets · Camera: Self-checkin for non-reserved seats, credit card number recognition ※ You can change access permission settings in Phone Settings > Apps > Korail+ [Developer Information] · Contact: 1588-7788 · Address : KORAIL Corporation, 240 Jungang-ro, Dong-gu, Daejeon (34618)
SUM Air
Book flights, manage your itinerary, and access mobile boarding passes for a seamless travel experience. Enjoy app-exclusive promotions and real-time updates for domestic travel within Korea.
- Real-time flight booking
- Manage bookings and cancellations
- Mobile boarding pass
- Multiple payment options
- App-exclusive promotions
- Real-time push notifications
Read full descriptionHide full description
Fly Light and Easy with SUM Air! From flight bookings to mobile boarding passes and simple payments—start your journey faster and lighter with the SUM Air App. Experience a new way of flying that connects every corner of Korea. [Key Services] Flight Booking & Management - Real-time Booking: Check seat availability for the Gimpo-Sacheon route and book instantly. - Manage Your Trip: View your booking history or process cancellations easily within the app. - Flight Status: Access real-time flight schedules and arrival/departure information. Fast & Convenient Boarding - Web Check-in & Mobile Boarding Pass: Skip the airport counter lines. Check in via the app and board immediately with your mobile pass. - Additional Services: Select your preferred seat or purchase extra baggage allowance with just one click. Simple Payment & Login - SUM Air PAY: Support for our dedicated SUM Air PAY, as well as Kakao Pay, Naver Pay, and Toss Pay. - 3-Second Login: Sign up instantly using your Kakao, Naver, or Google accounts. App-Exclusive Benefits - Special Promotions: Be the first to access ultra-low fares available only to app users. - Real-time Push Notifications: Get instant updates on booking status, check-in reminders, and weather-related flight changes. [A Special Journey with SUM Air] - Business Success: The fastest way to travel between the Seoul Metropolitan Area and Gyeongnam for your busy schedule. - Start Your Adventure: Arrive comfortably at Sacheon Airport, the gateway to the beautiful South Coast. - A Lifeline for Locals: Experience a premium transportation service that is faster and more comfortable than the KTX. [Access Permissions] SUM Air only requests the minimum permissions necessary to provide our services. - (Optional) Notifications: Used for booking confirmations, check-in reminders, flight status, and promotional benefits. [Customer Support] - Website: https://www.sumair.kr - Reservation Center: 1877-4325 (09:00 - 18:00)
Screenshots
Verdict
The clearest difference is review sentiment: SUM Air at 100% against KORAIL+'s 11%. KORAIL+'s advantage is update cadence (every 5 days vs every 3 weeks). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
KORAIL+ ships an update every 5 days, SUM Air every 3 weeks. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.
| Parameter | KORAIL+ | SUM Air |
|---|---|---|
| Price | Free | Free |
| Rating | 2.4 (11 ratings) — better | — |
| Positive reviews | 11.4% of reviews | 100.0% of reviews — better |
| Number of ratings | 11 — better | — |
| Update frequency | Every 5 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 137 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | 한국철도공사 | SUMAIR Co., Ltd. |
Customer experience
KORAIL+
SUM Air
Bugs and requests
KORAIL+
Reported bugs
5 issues- Ticket purchase info gets lost
- Can't access menu or view tickets
- Doesn't work on iPhones
- Doesn't work with foreign credit cards
- Crashes, freezes, and is unusable
Requested features
3 requests- Add English language support
- Allow non-Korean phone numbers and credit cards
- Improve user experience and stability
SUM Air
Not enough reviews yet to summarise bugs or requests.
In-app purchases
KORAIL+
No in-app purchases
SUM Air
No in-app purchases









