Apple Watch Ultra 4 Rumours: What's Changing
Bloomberg's Mark Gurman has all but confirmed a September reveal for the Ultra 4, and the leaks since have focused on one theme: making Apple's rugged flagship thinner without giving up battery life. A big health-sensor claim is in the mix too.
What's confirmed
Launch window
MacRumors reports that Bloomberg's Mark Gurman expects the Ultra 4 to launch alongside the Series 12 and new iPhones this September, matching Apple's usual autumn cycle.
Software
watchOS 27 will ship on the Ultra 4, bringing new watch faces including a variant of the Modular Ultra face, per 9to5Mac.
What's reported (analyst / supply-chain sourced)
Thinner titanium case
A May 2026 DigiTimes supply-chain report, relayed by multiple outlets including Basic Tutorials and Geeky Gadgets, suggests the Ultra 4's titanium case will be roughly 15% thinner than the Ultra 3's.
Blood pressure alerts under FDA review
DigiTimes-sourced reporting picked up by 9to5Mac claims Apple has submitted a more advanced blood pressure alert feature for FDA review — one that would flag concerning readings in near-real time rather than only producing monthly trend summaries.
Touch ID more plausible here than on Series 12
Leaked "AppleMesa" firmware code has been found across 2026 watch builds. MacRumors reports Apple is prioritising battery life over biometrics for this cycle generally, but several outlets, including the-gadgeteer, note the Ultra line is seen as the more likely candidate if Touch ID ships at all in 2026.
A bigger redesign is coming — just maybe not this year
9to5Mac reported in late June 2026 that a prominent leaker expects a "major overhaul" of the Apple Watch line next year, implying the Ultra 4's changes this cycle may be more incremental than the eventual redesign.
Twisti's opinion
The blood pressure feature is the one to watch
Of everything rumoured, the FDA-reviewed blood pressure alert looks like the most credible headline feature — it builds directly on the trend tracking Apple already shipped, and a regulatory filing is a much stronger signal than a firmware string. Treat the thinner case as likely, and treat Touch ID as a coin flip at best.
What we'll update
We'll update this page as soon as Apple confirms its September event date, and again with verified pricing and specs after any keynote.
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See current NZ retailer pricing on the Apple Watch Ultra 3 while we wait on Ultra 4 confirmation.
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