ChatGPT has achieved a remarkable milestone, becoming the most downloaded app globally, with 1.36 billion installs since its launch. In 2025 alone, it secured over 902 million downloads, surpassing TikTok by nearly 200 million and Instagram by around 380 million, according to AppMagic. OpenAI’s app has rapidly transitioned AI into mainstream use, capturing an 81.8% share of the AI chatbot market. Its growth trajectory echoes TikTok's early days, suggesting strong user engagement ahead.