Meta’s Muse logs 10.2 million U.S. downloads in 40 days

Meta’s Muse AI app recorded an estimated 10.2 million downloads in the United States and 10.9 million worldwide in its first 40 days, according to Sensor Tower, as the company’s latest AI product also posted higher reported retention than several rivals. The app launched on September 8, 2026. Sensor Tower’s estimates, reported across multiple accounts, put Muse among only 12 apps to reach 10 million U.S. downloads within 40 days. Downloads measure installations, not continued use, and the figures come from one market-intelligence source rather than independent measurements. Sensor Tower estimated that 30% of U.S. Muse users returned seven days after installation, compared with an average of 19% for ChatGPT, Claude and Grok. At 14 days, the firm put Muse retention at 23%, versus a 16% average for those competitors. The firm also estimated that Muse accounted for 39% of Meta’s U.S. advertising spend in October, up from 23% in September. Those figures represent shares of the company’s advertising spending, not dollar amounts. Sensor Tower separately estimated that Muse had 2.5 million daily active users on October 16, a 15% increase from the previous week. Meta said on its...