Korea's Mobile App Top 100, H1 2026: How AI Reshaped the Market

The global mobile app market is still growing at a healthy double-digit pace — estimated between $330 billion (Fortune Business Insights, 15.1% CAGR) and $391 billion (Mordor Intelligence, 17.2% CAGR) in 2026. But inside the Korea mobile app market, the quality of that growth is changing.

Three mega-trends shaping the category

AI as a default layer. ChatGPT crossed 1 billion global MAU in May 2026, and Gartner projects that 40% of enterprise apps will carry task-specific AI agents by the end of the year — AI is no longer a bolt-on feature but a baseline component of an app.

The rise of agentic AI. AI is evolving past simple Q&A toward autonomously judging and executing tasks; Deloitte projects the global agentic-AI market will reach $45 billion by 2030.

From downloads to time-on-app. Global app download growth has stalled below 1%, while in-app revenue and time spent keep climbing — the competitive center of gravity has shifted from new installs to holding users' attention.

Five domestic insights

Korea's own data tells a sharper story. First, the big-tech top three — YouTube, KakaoTalk, Naver, in that order — held their ranks unchanged for six straight months. Second, ChatGPT's breakout: it hit 15.44 million MAU in the AI/productivity category (17th overall, +16.4% month over month) and topped new installs. Third, virality-driven growth stood out — setlog peaked at 2.73 million DAU in April–May, and Chzzk gained 1.52 million new installs riding World Cup coverage. Fourth, Toss's dominance in finance continued, absorbing most banking-app usage time with roughly 9x the gap over the #2 app. Fifth, brand competition re-centered on value-for-money — Mega MGC Coffee, not Starbucks, led new installs in F&B, and Uniqlo led new installs in fashion.

Category-by-category competition

In commerce, Naver Plus Store (4.38 million) and Temu (4.36 million) ran a near dead heat. In F&B, Starbucks dominated overall (7.06 million MAU, 1.13 million new installs) while the #2–5 spots — Mega MGC, A Twosome Place, McDonald's, Kyochon — clustered within about 200,000 of each other. In fashion, Uniqlo led on scale while Zara led on time spent (1.97 million hours, 47.1 minutes per user). In AI entertainment, Zeta ran away with the category on an overwhelming 40 hours per user per month.

What this means for marketers

The message for marketers is unambiguous: new installs — the raw "acquisition" metric — no longer decide the winner. In a market where download growth has stalled, real competitive advantage now comes from how long you can hold a user's attention and in-app engagement, exactly as shown by Zara's lead in dwell time and Zeta's 40-hour monthly figure.

At the same time, as AI becomes a default layer inside apps, the point of contact for search, recommendation, and conversion is moving quickly toward AI agents. ChatGPT's explosive growth raises a new marketing question: how should your brand's app integrate with AI experiences, and how do you secure visibility inside AI-mediated recommendation environments (what's increasingly called GEO)? Value-driven brands leading new installs is itself a signal that practical choice can now outrun brand awareness. For a deeper look at topical authority in AI-driven discovery, see how topic authority wins in AI search, and for help building an engagement-first app or content strategy, explore Best Partner's services.