Apple Watch Ultra 4 vs. Apple Watch Ultra 3: Apple’s premium smartwatch
appleinsider.com Sep 15, 2026

Apple Watch Ultra 4 vs. Apple Watch Ultra 3: Apple’s premium smartwatch

AI-summarised brief · reviewed before publication

Apple unveiled the Apple Watch Ultra 4 at its Wednesday event, keeping the same 49 mm titanium design as the Ultra 3 but adding a new S11 chip, enhanced health sensors, and AI features such as Siri Recaps and Live Rewind. Battery life extends to 50 hours (84 in Low Power Mode) versus 42 hours on the previous model. The Ultra 4 also introduces satellite‑enabled emergency SOS, messages, and Find My, while maintaining 100‑meter water resistance and MIL‑STD 810H durability.

💡 Why It Matters

  • · The upgraded chip and satellite connectivity position the Ultra 4 as a more capable outdoor companion, expanding Apple’s reach into rugged, mission‑critical wearables.