Samsung Galaxy Watch4 vs Samsung Galaxy Watch9

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

9 differences
SpecificationSamsung Galaxy Watch4Samsung Galaxy Watch9
Display resolutionDiffers450 x 450 pixels480 x 480 pixels
Display technologyDiffersSuper AMOLEDAMOLED
Display typeDiffersSuper AMOLEDDigital
Watch case materialDiffersAluminumAluminium
Water resistanceDiffers5ATM + IP685 ATM
Bluetooth versionDiffers5.0Bluetooth 6.0 (44 mm · wi-fi only · sport)
Wireless chargingDiffersWPC-based wireless chargingYes
WeightDiffers30.3 g34 g
Operating system installedDiffersWear OS Powered by SamsungWear OS
Near Field Communication (NFC)SameYesYes
Wi-FiSameYesYes
Heart rate monitorSameYesYes
Battery life (max)Same40 h40 h
Always-on displaynot knownnot knownYes
Display diagonalnot known1.4"not known
Display number of coloursnot knownnot known16 million colours
Display technology marketing namenot knownnot knownSuper AMOLED
Pixel densitynot knownnot known327 ppi
Touchscreennot knownnot knownYes
Band sizenot knownnot knownMedium/Large 145mm to 205mm (44 mm · wi-fi only · sport)
Lens materialnot knownnot knownSapphire
Market positioningnot knownnot knownSmartwatch
Bluetoothnot knownnot knownYes
Bluetooth profilesnot knownnot knownA2DP, AVRCP, HFP, HSP
Wi-Fi standardsnot knownnot knownWi-Fi 4 (802.11n), 802.11g, 802.11a, 802.11b
Closure typenot knownnot knownSingle prong strap buckle
Heart rate sensor typenot knownnot knownOptical
Shapenot knownnot knownRound
Skin temperature sensornot knownnot knownYes
BeiDounot knownnot knownYes
Galileonot knownnot knownYes
GLONASSnot knownnot knownYes
GPS (satellite)not knownnot knownYes
Quasi-Zenith Satellite System (QZSS)not knownnot knownYes
Flash memorynot knownnot known32 GB
Processor frequencynot knownnot known2100 MHz
RAM capacitynot knownnot known2000 MB
Sensor typenot knownnot knownBIA
Accelerometernot knownnot knownYes
Ambient light sensornot knownnot knownYes
Barometernot knownnot knownYes
Geomagnetic sensornot knownnot knownYes
Gyroscopenot knownnot knownYes
Depthnot knownnot known46 mm
Thicknessnot knownnot known8.6 mm
Widthnot knownnot known43.7 mm
Battery capacitynot known361 mAhnot known
Battery typenot knownnot knownBuilt-in battery
Audio formats supportednot knownnot known3GA, AAC, AMR, AWB, M4A, MP3, OGA, OGG, WAV
Built-in cameranot knownnot knownNo
Built-in speaker(s)not knownnot knownYes
Processor coresnot knownnot known5
Processor manufacturernot knownnot knownQualcomm
Built-in microphonenot knownnot knownYes
International Protection (IP) codenot knownnot knownIP68
Dimensions (WxDxH)not known44.4 x 43.3 x 9.8 mmnot known
Activity measurementsnot knownGPS/Glonass/Beidou/Galileonot known
Device memorynot known16 GBnot known
Gorilla Glassnot knownYesnot known
Heart-rate derived metricsnot knownblood oxygennot known
Interchangeable strapsnot knownYesnot known
Security update termnot knownnot known31 July 2031
MIL-STD-810G compliantnot knownYesnot known
Military standardnot knownnot knownMIL-STD-810H