Apple Watch Ultra 4 review: longer battery life but still awaiting new features
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TL;DR
- The Apple Watch Ultra 4 has extended battery life to 79 hours and a faster S11 chip.
- New sensors provide more frequent heart rate and daytime HRV measurements, feeding into Vitals and readiness apps.
- Upgraded Siri and new watch faces are available, but advanced AI features are expected in late 2026.
- The design and core functionality remain similar to previous models, making it a solid refinement rather than a major leap.
- It offers comprehensive health and activity tracking, dual-band GPS, and improved charging speed.