ChatGPT Mobile Growth Slows Amid Rising Competition

In September 2025, ChatGPT reached 800 million weekly active users, doubling its numbers in just seven months. Despite these impressive figures, recent analysis by Apptopia indicates that ChatGPT's mobile app growth may have peaked. Since April 2025, the percentage increase in global downloads has slowed, and daily active user growth has plateaued.

October 2025 is projected to show an 8.1% decline in global download growth month-over-month. While ChatGPT continues to attract millions of daily downloads, this deceleration suggests the experimentation phase has ended. The decline coincides with Google's aggressive mobile AI strategy, as its Gemini app topped U.S. app store charts in September 2025.

Apptopia's data reveals that ChatGPT's metrics were already declining before Gemini's rise. Average time spent per daily active user in the U.S. dropped by 22.5% since July, with average sessions per DAU falling by 20.7% during the same period. Following the launch of GPT-5, users experienced more direct and concise responses.

ChatGPT's mobile app has surpassed 150 million total downloads, maintaining a 30% year-over-year growth rate. Users spend an average of 13 minutes per mobile session, and app store ratings remain strong. However, Apptopia's findings indicate a critical shift in user behavior, transitioning from viral novelty to utility tool.

Apptopia concludes that OpenAI must invest in app marketing or release new features to boost core metrics. ChatGPT held a 62.5% share in the generative AI market in 2025, but competitive pressure is unprecedented. ChatGPT will not disappear, but it must now prove it can sustain value beyond the initial wow factor.