Meta's new artificial intelligence application, Muse, has accumulated 3.4 million downloads by Sept. 24, according to market intelligence firm Sensor Tower, outpacing ChatGPT's early trajectory by a significant margin.
During its first nine days on app stores, from Sept. 8 to Sept. 17, Muse averaged 55 percent day-over-day download growth. ChatGPT averaged 24 percent during its first 10 days. Claude and Grok both saw download growth declines during their respective launches.
Other measurement firms reported varying figures. Apptopia estimates 4.3 million total downloads, with 2.6 million on iOS. Appfigures counted roughly 2.3 million installs as of Thursday, split nearly evenly between iOS and Android.
The growth spike aligns with Meta Connect, the company's developer conference this week, where Meta announced Muse features including video chat with the app's avatar, Mac computer use support, a dedicated email address, and smart glasses integration.
Sensor Tower data showed daily active users jumped 27 percent on Wednesday, Sept. 23, following the event's conclusion. Muse claimed the top ranking on the U.S. App Store on Sept. 18 and reached the top of Google Play on Sept. 19, where it remains. The app is currently available only in the U.S. and Canada.
Meta's distribution advantage is structural. The company is leveraging its 3 billion monthly active users across Facebook and Instagram to drive installations—a cross-platform reach that competitors lack. Instagram Threads, Meta's Twitter competitor, used the same playbook to reach over 500 million monthly active users in its first year.
The question is whether download velocity translates to usage and retention. Adoption curves are steep and often deceptive in the AI agent category. OpenAI, which launched ChatGPT as a free web app rather than a mobile-first product, faced different distribution constraints than Muse, which can leverage app store prominence and notification systems to build habits.
