Built for Extremes
Apple's Watch Ultra 3 pushes the boundaries with a brighter display, improved GPS, and new health sensors.
Design and Durability
The titanium case is 5% lighter. The display reaches 3,500 nits peak brightness. IP6X dust resistance and 100m water resistance remain standard.
GPS Accuracy
The dual-frequency L1/L5 GPS module delivers under 2 meters position error in urban canyons, compared to 5-8 meters for the Ultra 2.
Heart Rate Monitoring
The 4th-gen optical sensor tracks within 1-2 BPM of a chest strap during steady-state cardio.
New: Blood Pressure Trending
After calibration with a traditional cuff, it tracks relative blood pressure changes over time with promising correlation to clinical measurements.
Battery Life
68 hours of mixed use and 34 hours of continuous GPS tracking confirmed in our testing.
Verdict
The best fitness smartwatch for iPhone users. Casual fitness users are better served by the standard Apple Watch Series 11.
