#1 Free App in the US Apple App Store on October 16: Muse from Meta leads at 99% on Polymarket

Muse holds a commanding market lead

Muse from Meta is the clear favorite in Polymarket’s contract on the No. 1 free app in the U.S. Apple App Store on October 16. The headline published on Oct 16, 2026, at 4:24 AM ET puts its probability at 99%, while the supplied Polymarket account gives a more precise 98.1% implied probability.

According to Polymarket, Muse has held the leading free-app position since mid-September 2026. It launched September 8 as an agentic AI tool that links to users’ accounts to handle activities including email, shopping and scheduling.

Promotion and expansion support its position

Polymarket attributes Muse’s strength to extensive Meta promotion, millions of downloads and rapid expansion to Mac and iPad. Integrations with Asana, Canva and QuickBooks have also helped sustain its position ahead of rivals including ChatGPT, according to the platform.

The supplied summary reports no significant new platform headline in the preceding 15 minutes. Polymarket’s assessment instead rests on Muse’s existing momentum and visibility, with no competing app showing comparable strength. It identifies a surprise rival launch, a substantial service disruption or a policy change as possible causes of an overnight reversal, while judging such a one-day shift unlikely given historical patterns and current installation trends.

What it means for prediction markets

• The market strongly favors continuity: Both the 99% headline figure and the 98.1% probability in the supplied account indicate an overwhelming expectation that Muse will retain the top spot on October 16.
• The remaining uncertainty is event-driven: A competitor release, outage or policy change represents the principal reversal scenarios identified by Polymarket—not developments reported to have occurred.
• Probability is not confirmation: The quoted odds reflect traders’ expectations for the app-chart outcome, rather than a confirmed contract result.