Muse topped the App Store on about half of ChatGPT's debut download pace

The rank and the download estimates support different conclusions. Sensor Tower's earlier count put Muse at roughly 83,000 US iOS downloads in its first two days, about 41,000 a day ^[4]. ChatGPT averaged around 83,300 daily downloads in its debut week ^[5]. Muse reached the top of the chart on roughly half that daily pace ^[6]. implicator.ai reported that the two estimates cover different windows and are not directly comparable, and that the free chart measures download momentum ^[7].

Meta's own launches set the more useful baseline. Threads drew 4.3 million downloads on its first day; the Meta AI app drew 108,000 ^[8]. Both were promoted to Instagram's existing users. Muse launched on September 8 as a standalone brand through iOS, Android, muse.ai and WhatsApp ^[9].

The trust figures describe a population that mostly refuses agents outright. Oppenheimer & Co. found that 58% of its 1,500 respondents would not share passwords with any AI agent ^[11]. Among the 42% who might, Meta's share of stated trust works out to about one in five ^[12]. Visa's Earning Trust Report found that 23% of consumers trusted generative AI for payments and that 60% would not let AI handle money without human oversight ^[13]. Muse arrived less than two weeks after Meta agreed in August 2026 to a multistate settlement over social media harms reported at up to $18 billion ^[15].

What the agent does with that access is the part early users are publishing. Entrepreneur Joe Devoy wrote on X: "Yesterday I uploaded my auto insurance policy to Meta @Muse and asked for a better rate with identical coverage. In ~5 minutes, it found a policy saving me $3,500 /year, bought it, and canceled my old one." ^[23] Meta says Muse isolates each user's work in a dedicated virtual machine and requires approval before sensitive actions ^[14]. Another user, Brett Gordon, said Muse could see only the first frame of a workout video he had saved on Instagram, the app Meta owns ^[24].

The paid tiers cost 25% more inside the iOS app than on the web for the same token allowances, and Meta has not explained the difference ^[17][18]. "For the vast majority of users, they should be able to do what they need to within the free tier," said chief AI officer Alexandr Wang ^[19].

For anyone responsible for company laptops, the desktop build is the release that counts. It works with files, messages, calendars, notes and mail inside their native apps ^[16]. That leaves two options this quarter: block the install and give up whatever staff get from the free tier, or allow it and re-inventory which credentials an agent now holds on behalf of an employee ^[2]. Neither account describes an employer or a regulator acting on Muse during its first ten days.