Apple Watch Ultra 4 vs Apple Watch Ultra 3

Apple Watch Ultra 4

Apple Watch Ultra 4

vsApple Watch Ultra 3

Apple Watch Ultra 3

Apple Watch Ultra 4Apple Watch Ultra 3
CaseNatural and black titanium (3D-printed, 100 percent recycled titanium)Titanium (natural, black), 100% recycled titanium, 3D-printed
ChipS11—
Health SensorsHealth Sensing System: optical and electrical heart sensors, heart rate every five secondsOptical heart sensor with hypertension notifications, sleep score, ECG, blood oxygen, sleep apnea notifications, water temperature
Battery (everyday)Up to 50 h; up to 84 h in Low Power Mode—
Battery (workout)Extended Workout up to 25 h; Max Extended Workout up to 45 h with GPS every second—
Charging15 minutes adds up to 18 h of battery life—
GPSApple states the most accurate on-device GPS in a sports watch—
ConnectivitySatellite Emergency SOS, Find My and Messages (free for two years with activation)5G cellular, built-in two-way satellite communications, dual-frequency GPS
SoftwarewatchOS 27 with Siri AI—
PriceFrom $799 in the U.S.—
Display—Largest display of any Apple Watch (LTPO3, wide-angle OLED, borders 24% thinner), 1Hz Always-On refresh
Battery—Up to 42 hours; up to 72 hours in Low Power Mode; 15 minutes of fast charging adds up to 12 hours
Water Resistance—WR100; Oceanic+ dive computer app
OS—watchOS 26 (requires iPhone 11 or later with iOS 26)