Last verified: 2026-08-27 00:15 KST
Every app list for Korea has the same problem. It tells you what to install and stops before the part that actually blocks you — the moment the app opens, works for about four screens, and then asks for something you do not have yet.
Installing is free and instant. What gates you is a sequence of four separate checks, and most guides collapse them into one. This page sorts the apps by which check they run into, so you install things in an order that does not waste your first week.
The four walls, in the order you hit them
An app can stop you at any of these, and they are genuinely different requirements. Clearing one does not clear the next.
- App store region. Some Korean apps are only listed in the Korean storefront. Nothing to do with your visa — it is an Apple or Google account setting.
- A Korean phone number that receives SMS. A data-only travel eSIM cannot receive the verification text, so any service built on SMS authentication is closed to you until you have a voice-and-SMS line.
- Korean identity verification (본인인증). This runs against your name, birth date and phone number as registered with a Korean carrier. Having a number is not the same as having it registered in your name.
- A Korea-issued payment card or bank account. The last wall, and the one that surprises people most, because it blocks features that look purely technical.
Wall four is worth a concrete example, because it is documented rather than folklore. Apple’s own support documentation states plainly that a South Korea-issued credit or debit card is required to purchase or top up a Tmoney transit card from Apple Wallet (Apple Support — Add a transit card to Apple Wallet). Your foreign Visa in the same Wallet will not do it. Checked 2026-08-27.
That single sentence rewrites the advice you will read elsewhere. “iPhone users can just use Apple Pay for transit in Korea” is true about the tap and false about the top-up.
Install before you land
Three things, and none of them need a Korean anything.
Papago — Naver’s translator. Stronger on Korean-English nuance than the general-purpose alternatives, and the camera mode is the feature that matters: it reads menus, contracts, delivery labels and the pharmacy shelf. Download the Korean language pack for offline use before you fly.
Google Play · App Store
Naver Map provides local navigation and transit information. Check the route and travel mode in the app before departure; do not assume that all mapping apps offer the same coverage.
Your eSIM provider’s app, activated and tested while you still have working wifi. Details on choosing between SIM and eSIM are in our SIM and eSIM guide.
Save your accommodation’s address in Korean — the road-name form — as a phone note before you leave. You will paste it into a map, a delivery form and possibly a dispatcher, and typing Hangul on a foreign keyboard at 1am is a solvable problem you should solve in advance.
Day one: moving and talking
Kakao Map is the second mapping app, and both are worth keeping. Naver tends to be better for transit and large venues; Kakao tends to surface small independent businesses and local reviews. When one of them cannot find a place, the other usually can.
Google Play · App Store
Kakao T handles taxis, and its real value is that you never have to pronounce a destination. You set it in the app, see the estimate, and ride. Paying by registered card requires wall four; paying the driver in cash on arrival does not. That distinction is what makes it usable on day one. It is also the practical fallback from the airport — see our Incheon Airport to Seoul guide.
Google Play · App Store
KakaoTalk is not optional and not really a choice. Your landlord, your HR contact, your gym, your delivery driver and your bank’s customer service all live here. It installs and runs on a foreign number, but full account verification behaves best on a Korean one — another reason the SIM comes before everything else.
Google Play · App Store
A dedicated subway app is optional but useful: offline route planning, which car to board for your transfer, and — the feature you will eventually be grateful for — last-train times. KakaoMetro is the common choice on iPhone. On Android, several equivalents exist under different names; check the store rather than trusting a package name copied from an old guide. Naver Map and Kakao Map both cover subway routing well enough that you can skip this entirely at first. Checked 2026-08-27.
Which wall does each app hit?
| App | Use | Works on arrival | Needs Korean number | Needs Korean card / ARC |
|---|---|---|---|---|
| Papago | Translation | Yes | No | No |
| Naver Map | Navigation, transit | Yes | No | No |
| Kakao Map | Places, local search | Yes | No | No |
| Kakao Metro | Subway, last train | Yes | No | No |
| Kakao T | Taxi | Partial — cash fare | For account features | For in-app payment |
| KakaoTalk | Messaging | Partial | For full verification | No |
| NAVER | Search, reviews | Yes | No | No |
| Coupang | Shopping | Browse only | Yes | For checkout |
| Baedal Minjok | Food delivery | Browse only | Yes | For checkout |
| Karrot | Second-hand | Browse only | Yes — location-verified | No |
| Toss | Banking, transfers | No | Yes | Yes — ARC-based |
| Mobile T-money | Transit card | Partial | No | See note below |
Week one: shopping, food, money
Coupang is Korea’s default for everything physical, and its overnight delivery genuinely arrives overnight. Browsing works immediately; checkout is where walls two and four appear.
Google Play · App Store
Baedal Minjok (배달의민족) supports English, Chinese and Japanese according to its publisher’s App Store release notes, checked October 6, 2026. On iPhone, use System Settings → Baemin → Language. A translated interface does not establish which phone numbers or payment methods a particular checkout accepts; check those separately. See our delivery-app guide.
Karrot (당근) is the neighbourhood second-hand market, and it is how most people furnish a first apartment for a fraction of retail. It verifies your neighbourhood by location, which means it only becomes useful once you have a fixed address. Meet in building lobbies or convenience stores, and expect cash or bank transfer.
Google Play (Korean) · App Store
Toss is the friendliest of the Korean fintech apps and the one most foreign residents settle on. It is also the clearest example of wall four: nothing meaningful works until identity verification against an ARC succeeds. Do not fight it on week one. See our bank account guide for the order that works.
Google Play · App Store
NAVER is where Korean businesses actually live. Google will not find the restaurant, the hours or the review. Search in Naver, then let the app translate the blog posts — that is the single most useful habit to build in month one.
Google Play · App Store
The transit card question, answered properly
This is where English guides diverge most from reality, so here is what is documented.
Android has had mobile T-money for years through the Mobile T-money app. iPhone gained it in July 2025: a prepaid T-money card can be added to Apple Wallet, and Express Mode lets you tap without unlocking — Apple states this continues to work for a period after the battery runs down.
The catch is the money, not the tap. Per Apple’s own support page, topping up a Tmoney card from Apple Wallet requires a card issued in South Korea. Korean press coverage at launch reported that only prepaid T-money was supported and that subsidised passes such as the Climate Card and K-Pass were not compatible at that time (Korea Herald, 22 July 2025).
Since then the picture has moved — there are reports of foreign-issued card top-ups being enabled in the Mobile T-money app during 2026, and of K-Pass support arriving on iOS. We have not been able to confirm either from a primary source, so we are not stating them as fact here. If you are relying on it, check in the app before you commit to a plan, and treat cash top-up at a convenience store or station machine as the fallback that always works.
Mobile T-money on the App Store
Emergency and safety
The Korean National Police publish a 112 reporting app. It transmits your identifying details and location automatically with the report, and lets you file by text with a photo, video or audio attachment rather than speaking. Install it and fill in your details now, not later — it is only fast if it already knows who you are.
Google Play
You may see older English guides recommend 긴급신고 바로 (Emergency Call BARO), the Ministry of the Interior and Safety’s combined police-fire-coastguard app. When we checked on 2026-08-27 its listing was unreachable on both Google Play and the App Store across every storefront we tried. We cannot tell you whether it was withdrawn, renamed or restricted — only that we could not open it, and that we will not recommend an emergency app we cannot verify. Checked 2026-08-27.
Which number to call, and the language coverage behind each one, is covered in our emergency numbers guide.
After your residence card arrives
A residence card can help with identity checks, but each app and payment product still has its own requirements. The apps that were half-useful become fully useful, and it is worth doing a deliberate pass rather than discovering it piecemeal: finish Toss verification, add a payment method to Coupang and your delivery app, register a card in Kakao T, and set up a transit card top-up that does not require a convenience store. The residence card itself is covered in our ARC guide.
One caution: a residence card supports verification, it does not guarantee it. Individual services set their own eligibility, and some still decline foreign-national accounts for reasons they do not explain. If one refuses, try a competitor rather than assuming the category is closed.
Problems people actually hit
“Not available in your region.” Change your app store account country, or use the service’s web version. This is wall one and it has nothing to do with your visa status.
“It sent a verification code that never arrived.” Almost always a data-only eSIM. A data plan cannot receive SMS, and no setting fixes it.
“I have a Korean number but verification still fails.” The line is probably not registered in your own name — a common situation with employer-provided or shared plans. Identity verification checks the registration, not the SIM.
“Which app pays for the bus?” None of them, directly. A transit card pays; the map apps only tell you which bus.
Verification note. On September 24, 2026 an AI-assisted check went back through the official sources linked in this guide and confirmed each still resolves to the same official page. I publish this guide under my own name and am responsible for what it says. Rules and fees in Korea change often; if you spot something out of date, email hello@90dayskorea.com and it will be re-checked and corrected.
Sources
- Apple Support — Add a transit card to Apple Wallet (Tmoney top-up requirement)
- Korea Herald — Apple Wallet T-money launch coverage, 22 July 2025
- Korean National Police Agency — 112 reporting app, official listing
- T-money Co. — Mobile T-money official listing
- Each app’s official App Store and Google Play listing, linked inline above
Last verified: 2026-08-27 00:15 KST. App features and verification requirements in Korea change frequently and often without announcement in English. Where we could not confirm a change from a primary source, this page says so rather than guessing.