Comparison

KORAIL+ vs SUM Air

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Purchase train tickets
  • Korea Railroad journeys
  • Convenient booking platform
  • Travel across the country
Features
Read 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)

About

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.

Highlights
  • Real-time flight booking
  • Manage bookings and cancellations
  • Mobile boarding pass
  • Multiple payment options
  • App-exclusive promotions
  • Real-time push notifications
Features
Read 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

KORAIL+4 screens
SUM Air4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 8 level
KORAIL+ versus SUM Air: the parameters behind the verdict, then further details
ParameterKORAIL+SUM Air
PriceFreeFree
Rating2.4 (11 ratings) — better—
Positive reviews11.4% of reviews100.0% of reviews — better
Number of ratings11 — better—
Update frequencyEvery 5 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.0 — better15.1
Further details — not scored
Size137 MB24 MB
Age rating4+4+
Developer한국철도공사SUMAIR Co., Ltd.

Customer experience

KORAIL+

All ratings11 ratings
Positive27.3%
Neutral9.1%
Negative63.6%
Written reviews263 reviews
Positive11.4%
Neutral6.1%
Negative82.5%

SUM Air

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

None

KORAIL+

No in-app purchases

None

SUM Air

No in-app purchases

Questions

Is KORAIL+ free?
KORAIL+ is free to download, with no in-app purchases.
Is SUM Air free?
SUM Air is free to download, with no in-app purchases.
Do KORAIL+ or SUM Air have ads?
Neither KORAIL+ nor SUM Air shows ads.
Which is updated more often, KORAIL+ or SUM Air?
KORAIL+ ships an update every 5 days, and SUM Air every 3 weeks. Most recently, KORAIL+ was updated on October 24, 2026 and SUM Air on October 20, 2026.

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