Apple's Ultra smartwatch line just got its first real refresh in three years.
The Apple Watch Ultra 4 launches at $799, replacing the now-discontinued Ultra 2 (still available refurbished from $589). Both keep the same 49mm titanium case, Action button, siren, and 3,000-nit display, so this isn't a redesign. The real changes are internal: a new S11 chip with 4GB of RAM (double the Ultra 2), a Health Sensing System that checks heart rate every five seconds instead of periodically, and satellite-based Emergency SOS, Messages, and Find My. Battery life also jumps from 36 to 50 hours of normal use, and charging speeds up from about an hour to 45 minutes for an 80% charge.
Why it matters: this is a software-enabled upgrade dressed up as a hardware one. The extra RAM and sensors exist mainly to power features like Recovery HRV, a Readiness score, and on-device Audio Intelligence - the kind of thing Apple can, and will, keep adding through watchOS updates for years, which is exactly why Apple is pitching future-proofing over any single new sensor. That's a familiar Apple Watch pattern: buy the compute headroom now, collect the features later.
If your Ultra 2 still gets through your workouts, there's no urgent reason to switch - it runs watchOS 27 with Siri AI support just fine. But if you're buying an Ultra for the first time, paying $799 for a chip that will keep gaining features for years beats saving a few hundred dollars on a refurbished model that's already at the end of its runway.