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Meta's Personal AI Assistant Muse Tops US iOS Free Chart, Zuckerberg's Net Worth Surges

Meta's personal AI assistant Muse has topped the US iOS App Store free chart less than two weeks after launch, with over 2.5 million downloads, surpassing Claude and Grok and trailing only ChatGPT. Muse operates as a long-running personal agent with its own cloud computer and browser, capable of executing web tasks, handling emails, and making bookings upon user authorization. Following the news, Meta's stock rose 11.4% on September 21, and Zuckerberg's net worth increased by about $25 billion.

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After Muse's Explosive Rise: A Personal AI Assistant Must Pass Through Two Layers of Infrastructure

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Meta's personal AI assistant Muse hit the top of the U.S. iOS free chart less than two weeks after launch, surpassing 2.5 million cumulative downloads and driving Meta's stock up 11.4% in a single day. But what truly determines how far it can go is not how smart the model is, but whether it can pass through both layers of infrastructure at once: the operating system and platform services.

  • Muse launched on September 8 and reached the top of the U.S. iOS App Store free chart in less than two weeks.
  • According to secondhand reports, its cumulative downloads exceeded 2.5 million, surpassing Claude and Grok over the same period and trailing only ChatGPT.
  • On September 21, Meta's stock rose 11.4%, the largest single-day gain since April 2025.
Open section navigationWhy a No. 1 Spot on the Download Chart Deserves Separate Discussion

Why a No. 1 Spot on the Download Chart Deserves Separate Discussion

Meta's personal AI assistant Muse launched on September 8 and reached the top of the U.S. iOS App Store free chart in less than two weeks. According to secondhand reports, cumulative downloads from launch to the time of reporting had exceeded 2.5 million, surpassing Claude and Grok over the same period and trailing only ChatGPT. For a company that already owns Facebook, Instagram and WhatsApp, producing another app that tops the download chart is not surprising; what is truly worth pondering is the timing of its appearance.

The capital market's reaction was equally direct. On September 21, Meta's stock rose 11.4%, the largest single-day gain since April 2025. According to Forbes real-time estimates, Zuckerberg's net worth briefly rose to $253.6 billion, an increase of about $25 billion from the previous trading day. It should be noted that the download figures, chart comparisons and net worth numbers all come from secondhand reports and lack first-party source verification, so they should be treated as source claims rather than confirmed facts.

The Dividing Line Between Muse and Chatbots: It Has Its Own Computer

Muse's core difference is that it has its own cloud virtual machine and browser. After user authorization, it can log into various web pages on its own to execute tasks, open web pages, fill out forms, handle emails and complete bookings; even if the user closes the app on their phone midway, it continues operating in the background. It also retains the user's preferences and historical information and continues to draw on them in subsequent tasks.

This change is far more directly perceptible to ordinary users than gaining a few more percentage points on an evaluation leaderboard: previously, users went to AI with questions; now, they hand off a task and let it complete the follow-up work on their behalf. But this also means its long-term operation depends on users continuously granting email, calendar, account and web operation permissions—the stronger the capability, the longer the authorization chain.

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Credibility boundary

The factual basis of this article comes from a secondhand report (DeepTech深科技, September 22, 2026), which cites Meta's official blog, TechCrunch, Reuters and others as reference links, but this article was unable to directly verify the first-party original texts. Therefore: Muse's launch date, reaching the top of the U.S. iOS free chart, Meta's stock rising 11.4% on September 21, and Amazon blocking Muse shopping from September 20 are treated as confirmed facts; the 2.5 million downloads, the comparison with Claude/Grok, Zuckerberg's net worth, the $14.3 billion stake in Scale AI, and the timeline of Muse Spark and Meta AI are all treated as source claims without third-party verification. The judgment about Apple's and Google's entry-point advantages is an inference based on sources. The security dispute between Meta and Amazon, the long-term impact of personal agents on platform business models, and the prospects for Meta's smart glasses coordination all involve uncertainty.

Sources for this version

  1. Meta 再次上桌！个人AI产品爆红，扎克伯格身价直涨2000亿DeepTech深科技

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DeepTech深科技

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