Apple Watch Ultra 4 review: 22-mile run tests adventure watch

Apple Watch Ultra 4 review highlights the S11 chip, a redesigned 32-lobe heart rate sensor, up to 50 hours of battery life and a new Readiness score. Price is $799, with sales starting September 18, 2026.

• Battery life up to 50 hours vs 42 on Ultra 3
• New 32-lobe heart rate sensor and S11 chip
• Adds Readiness score and Health Age metric
• Price $799, sales start September 18, 2026