ChatGPT remains the most-used AI mobile app globally, recording 592 million combined monthly active users across Google Play and iOS apps, according to the Digital 2026 Mid-Year Global Update Report. Google Gemini ranks a distant second with 152 million users, followed by Grok with 61.9 million. Deepseek records 53.3 million users, while Perplexity has 37.9 million. Claude has 31.6 million users, while Microsoft Copilot records 25.4 million. The figures highlight the growing use of AI-powered mobile applications, with ChatGPT maintaining a significant lead over other major AI platforms in global monthly active users.