ChatGPT has solidified its position as the world's most popular mobile app in early 2026, overtaking traditional social media giants like TikTok and Instagram with hundreds of millions of downloads and massive monthly active user growth, as artificial intelligence tools reshape how people communicate, create and consume content on smartphones.

Data from industry trackers such as Business of Apps and Appfigures show that generative AI applications, led by OpenAI's ChatGPT, captured unprecedented user interest in 2025 and carried that momentum into 2026. ChatGPT alone amassed around 770 million downloads worldwide in 2025, the highest single-year total for any app, while maintaining strong engagement into the new year. Its rival, Google Gemini, also cracked the top tier with hundreds of millions of downloads, signaling a seismic shift toward AI assistants in everyday mobile usage.

Here are 10 mobile apps with the highest number of users and downloads globally as of early 2026, based on cumulative downloads, monthly active users (MAU) and engagement metrics reported by analytics firms. Rankings blend lifetime downloads, recent download surges and estimated active user bases, reflecting both established platforms and fast-rising AI newcomers.

1. ChatGPT (OpenAI) — The breakout star of 2025-2026. With roughly 770 million downloads in 2025 alone and continued rapid growth, ChatGPT leads in both downloads and engagement. Users rely on it for writing assistance, coding help, research, image generation and daily productivity tasks. Its integration across devices and voice features have driven exceptional retention, making it the most-used AI app worldwide.

2. TikTok (ByteDance) — The short-video platform remains a powerhouse with approximately 644 million downloads in 2025 and an estimated 1.4-2.2 billion monthly........

© International Business Times