In the Korean market, the average number of monthly users of ‘ChatGPT’ in the first half of this year exceeded 23 million. The use of artificial intelligence (AI) services continues to expand. On the 14th, app analysis service Wise App Retail announced the ranking of mobile apps that grew the most in the first half of 2026. According to this, the app that grew the most was OpenAI's AI service ChatGPT. The average number of ChatGPT monthly users was 23.24 million, an increase of 9.86 million compared to the same period last year. Google’s AI service ‘Gemini’ also ranked 3rd with an average monthly number of users of 7.79 million, an increase of 6.81 million compared to the same period last year. Second place was ‘Setlog’, a daily sharing social network service (SNS) that was popular mainly among the MZ generation, with an average monthly number of users of 7.33 million. It reached 100,000 people. Setlog was first released for the iPhone in February of this year, and was released for Android last April. It was followed by △Digital Onnuri 3.63 million people △Naver Plus Store 3.59 million people △Google 3.47 million people △Block Block