Apple Watch Ultra 3 vs Apple Watch Ultra 4

The two products' specifications row by row. Rows where they differ are marked; a missing value is unknown, never equal.

4 differences
SpecificationApple Watch Ultra 3Apple Watch Ultra 4
Watch case materialDiffersTitaniumTitanium case, Grade 5
Water resistanceDiffersWR100100m (swim, snorkel, scuba, high-speed water sports)
Battery life (max)Differs42 h50 h
Wireless chipsetDiffersS10S11 chip with 64-bit dual-core processor
Watch glass typenot knownSapphire crystalnot known
Display brightnessnot known3000 nitsnot known
Display resolutionnot knownnot known422 by 514 pixels
Display technologynot knownOLEDnot known
Depthnot knownnot known12 mm
Weightnot knownnot known63.0 g
Widthnot knownnot known44 mm
Heart rate monitornot knownYesnot known
Wrist size rangenot knownnot known130–210mm
Built-in microphonenot knownnot knownYes
International Protection (IP) codenot knownnot knownIP6X
Built-in speaker(s)not knownnot knownYes
Battery life (power save mode)not known72 hnot known
Operating system installednot knownnot knownwatchOS
Activity measurementsnot knownDual-frequency GPSnot known
Device memorynot knownnot known64 GB
Heart-rate derived metricsnot knownnot knownblood oxygen
Link to manufacturer informationnot knownnot knownhttps://apple.com/apple-watch-ultra-4/specs/
Measurementsnot knownnot knownHeight: 49mm Width: 44mm Depth: 12mm
Sustainable technologies and materialsnot knownnot known100% recycled titanium in the case
Military standardnot knownnot knownMIL-STD 810H