Meta Platforms' Muse AI app quickly becomes popular with 2.8 million downloads in 12 days

In the United States, Meta Platforms launched its Muse AI app on September 8, 2026, which quickly became popular, achieving 2.8 million downloads in just 12 days. The app allows users to create customized AI agents for various tasks. Following its success, Meta's stock rose by 11%, while Amazon blocked the app from its retail site, citing violations of its terms of use.