ASO agency South Korea: three stores, domestic giants, and a discipline that lives inside the companies.

Korea is a market where the usual ASO advice needs footnotes. Android has a much larger share than in the West, and Android in Korea is not just Google Play: Samsung’s Galaxy Store ships on every Galaxy phone, and the domestic ONE store, backed by the carriers and Naver, is a real distribution channel for games. Then there are the giants. Naver, Kakao and Coupang are not just apps; they are the platforms people search inside, and they own the categories a foreign fintech or commerce app most wants to enter. A keyword strategy built for the US App Store does not survive contact with any of that.

So who sells ASO in Korea? Almost no one, as a discipline. Korean app companies, especially the games publishers, do it in-house with teams who understand all three stores and never advertise. The vendors that rank for the search are localisation firms, who produce excellent Korean and call it optimisation, and foreign agencies with a Korea slide, who run the global playbook through a translation partner and a keyword tool that was never built for Korean search behaviour. Both give you a listing that reads well and was decided somewhere else.

The translation problem is sharper here than almost anywhere. Korean search mixes Hangul, English loanwords and brand names in ways that a translated keyword list will not predict. Korean users read screenshots for detail and trust signals, not for a minimalist hero claim. And a foreign app’s realistic position in a category is decided by which domestic giant already owns the demand. Those are decisions, and a localisation firm does not make them. It makes the words for decisions made elsewhere.

The second pattern is the games instinct. Korea’s marketing agencies grew up serving one of the world’s largest games industries, and their store-page instincts are games instincts: creative volume, pre-registration campaigns, launch-day chart pushes, paid scaling. Right for a game. Wrong for a fintech, health or productivity app whose installs come from search and whose listing needs a considered claim, not a launch push.

The third pattern is the Galaxy Store blind spot. Foreign agencies talk about ‘the stores’ and mean Apple and Google. In Korea, ignoring the Galaxy Store means ignoring a channel that ships pre-installed on the majority of Android phones in the country. A Korean ASO plan that does not mention Samsung is a Western plan with a translation.

Against that: one consultant who treats Korea as a category read across three stores, not a translation job. A teardown against your actual Korean competitors, including the giants. A first-screenshot hypothesis built for how Korean users decide. A keyword architecture built from Korean search behaviour with native input, and a Galaxy Store plan alongside Google Play. One test. A handover with dates, and a native copywriter for the words, after the decisions are made.

To be fair to the Korean market: if your message is decided and tested and you need excellent Korean, a good localisation firm is the right purchase. If you are a game, Korean launch agencies are genuinely good at the launch push. If what you need is to know what your Korean listing should say across three stores, no vendor that ranks for the search will tell you. Send me the listing and I will show you what a Korean teardown looks like.