GoKawiilApple Watch Ultra 4 has the same external look as Ultra 3, but it’s packed with internal upgrades to the chip and health sensors that unlock new and improved features. Here’s everything new in Apple Watch Ultra 4 vs Ultra 3.
Performance: S11 chip and 4GB RAM
Apple often includes a new chip with its latest Watch models, but most chip updates include only minor changes and minimal performance gains. And last year, Apple opted to stick with the same S10 from 2024.
But Apple Watch Ultra 4 has a brand-new S11 chip. S11 unlocks exclusive new software features thanks to its more powerful capabilities.
Apple doesn’t give specific benchmarks to measure the improvements, only saying S11 is its “most powerful wearable chip.”
Apple Watch Ultra 4 also doubles the memory of Ultra 3, with 4GB versus the 2GB of last year’s model.
Health: All-new, more powerful sensors
Apple Watch Ultra 4 has an all-new Health Sensing System that might be the biggest change ever to the Watch’s internal sensors. Apple says the new system “unlocks deeper health and fitness insights.”
Here’s the breakdown of feature improvements, per Apple:
Heart rate tracking : Second-generation electrical heart sensor and always-on optical heart sensor enable high-frequency background heart rate tracking that you can view on new heart rate watch face complication
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