Meta's Muse AI hits #1 on App Store with 730K downloads, lifting stock

Meta's Muse assistant climbed to #1 on Apple's US App Store within 10 days of launch, logging 730,000 downloads on the back of the Muse Spark 1.3 foundation model. The consumer traction reframed Meta as an AI-app contender and prompted Wells Fargo to raise its price target to $796 from $640, sending shares up sharply.

The economics are the real debate. Meta estimates it needs 115 million paying subscribers at $20/month to unlock $28 billion in annual AI revenue — a bar analysts at 247WallSt called unlikely to be cleared. That skepticism carried into the community, where r/ArtificialInteligence users dismissed Muse's data-isolation claims as 'marketing assertion rather than definitive guarantee' and demanded independent verification rather than task-automation hype.

Security is the immediate risk: a zero-day vulnerability was reportedly discovered in Muse just before Meta Connect on September 23, an awkward overhang for a launch built on privacy messaging. It also connects to the week's broader safety narrative around agent security, on which Meta's Yann LeCun publicly disputed claims he ever asked to stop LLM R&D.

Competitively, Muse pits Meta directly against ChatGPT, Gemini, and Apple's new Siri AI in the consumer assistant race — a market where distribution (Meta's billions of users) is Meta's structural advantage but monetization is unproven. What to watch: whether download momentum converts to paying subscribers at anywhere near the 115M target, whether the zero-day forces a patch cycle during Connect, and what Meta unveils at the event itself (Muse Connectors, Llama updates, and a Stripe payments partnership are all expected).