The best AI app in 2025 by popularity, monthly active users, and downloads is ChatGPT by OpenAI. It has 546.15 million monthly active users worldwide as of April 2025 and was the most downloaded AI app in 2024 with 250.1 million installs globally. ChatGPT is widely used for a variety of personal and professional tasks and remains the top choice among AI assistants.
Other notable popular AI apps include Google's Gemini, DeepSeek, Doubao, and Grok, but none reach ChatGPT's scale of usage and popularity. ChatGPT also offers a free tier with a paid Plus plan for additional features.
In summary, ChatGPT stands out as the best AI app in 2025 based on user metrics and comprehensive utility across many domains.
