Screen size
Watch Series 102.0"
Watch Ultra 3Winner: 2.0"+1%
Quick verdict
Watch Ultra 3 leads the measured specs 5-3.
Measured wins
Watch Series 10
3
spec wins
Ties
5
equal specs
Watch Ultra 3
5
spec wins
Overall winner
Screen size
Technology
Watch Series 10
GSM / HSPA / LTE
Watch Ultra 3
GSM / HSPA / LTE / 5G
2G bands
Watch Series 10
GSM 850 / 900 / 1800 / 1900
Watch Ultra 3
GSM 850 / 900 / 1800 / 1900
3G bands
Watch Series 10
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - International, China, HK, HSDPA 850 / 1700(AWS) / 1900 / 2100 - USA, LATAM, Canada
Watch Ultra 3
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - International, China, HK, HSDPA 850 / 1700(AWS) / 1900 / 2100 - USA, LATAM, Canada
4G bands
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
equal specsMain camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
equal specsUSB
5G support
NFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
Watch Series 10
1, 2, 3, 4, 5, 6, 7, 8, 18, 19, 20, 25, 26, 28, 39, 40, 41, 66 - International, China, HK, 1, 2, 3, 4, 5, 6, 7, 12, 13, 14, 17, 18, 19, 25, 26, 39, 40, 41, 66 - USA, LATAM, Canada
Watch Ultra 3
1, 2, 3, 4, 5, 6, 7, 8, 18, 19, 20, 25, 26, 28, 39, 40, 41, 66 - International, China, HK, 1, 2, 3, 4, 5, 6, 7, 12, 13, 14, 17, 18, 19, 25, 26, 39, 40, 41, 66 - USA, LATAM, Canada
Speed
Watch Series 10
HSPA, LTE
Watch Ultra 3
HSPA, LTE, 5G
5G bands
Watch Series 10
-
Watch Ultra 3
SA/NSA
Announced
Watch Series 10
2024, September 09
Watch Ultra 3
2025, September 09
Status
Watch Series 10
Available. Released 2024, September 20
Watch Ultra 3
Available. Released 2025, September 19
Dimensions
Watch Series 10
46 x 39 x 9.7 mm (1.81 x 1.54 x 0.38 in)
Watch Ultra 3
49 x 44 x 12 mm (1.93 x 1.73 x 0.47 in)
Weight
Watch Series 10
34.4 g (42mm), 41.7 g (46mm) (1.48 oz)
Watch Ultra 3
61.6 g or 61.8 g (black) (2.15 oz)
Build
Watch Series 10
Sapphire crystal front, ceramic/sapphire crystal back, titanium frame (grade 5)
Watch Ultra 3
Sapphire crystal front, ceramic/sapphire crystal back, titanium frame (grade 5)
SIM
Watch Series 10
eSIM
Watch Ultra 3
eSIM
Other
Watch Series 10
IP6X certified 50m water resistant ECG certified (region dependent SW application; HW available on all models) Depth gauge to 6m
Watch Ultra 3
IP6X certified 100m water resistant (22810:2010) 40m swimproof/diving (EN13319) MIL-STD-810H compliant ECG certified (region dependent SW application; HW available on all models)
Type
Watch Series 10
Retina LTPO3 OLED, 2000 nits (peak)
Watch Ultra 3
Retina LTPO3 OLED, 3000 nits (peak)
Size
Watch Series 10
1.96 inches
Watch Ultra 3
1.98 inches
Resolution
Watch Series 10
496 x 416 pixels (~330 ppi density)
Watch Ultra 3
514 x 422 pixels (~326 ppi density)
Protection
Watch Series 10
Sapphire crystal glass
Watch Ultra 3
Sapphire crystal glass
Other
Watch Series 10
Wide-angle OLED
Watch Ultra 3
Wide-angle OLED
OS
Watch Series 10
watchOS 11, upgradable to watchOS 26.2.1
Watch Ultra 3
watchOS 26, upgradable to watchOS 26.2.1
Chipset
Watch Series 10
Apple S10
Watch Ultra 3
Apple S10
CPU
Watch Series 10
Dual-core
Watch Ultra 3
Dual-core
GPU
Watch Series 10
PowerVR
Watch Ultra 3
PowerVR
Card slot
Watch Series 10
No
Watch Ultra 3
No
Internal
Watch Series 10
64GB
Watch Ultra 3
64GB
Other
Watch Series 10
No
Watch Ultra 3
No
Loudspeaker
Watch Series 10
Yes
Watch Ultra 3
Yes, with dual speakers (86-decibel)
3.5mm jack
Watch Series 10
No
Watch Ultra 3
No
WLAN
Watch Series 10
Wi-Fi 802.11 b/g/n, dual-band
Watch Ultra 3
Wi-Fi 802.11 b/g/n, dual-band
Bluetooth
Watch Series 10
5.3, A2DP, LE
Watch Ultra 3
5.3, A2DP, LE
Positioning
Watch Series 10
GPS, GLONASS, GALILEO, QZSS, BDS
Watch Ultra 3
GPS (L1+L5), GLONASS, GALILEO, BDS, QZSS
NFC
Watch Series 10
Yes
Watch Ultra 3
Yes
Radio
Watch Series 10
No
Watch Ultra 3
No
USB
Watch Series 10
No
Watch Ultra 3
No
Sensors
Watch Series 10
Accelerometer, gyro, heart rate, barometer, always-on altimeter, compass, SpO2, VO2max, temperature (body), temperature (water)
Watch Ultra 3
Accelerometer, gyro, heart rate, barometer, always-on altimeter (-500m to 9000m), compass, SpO2, VO2max, temperature (body), temperature (water)
Other
Watch Series 10
Temperature sensing (0.01˚ accuracy) Ultra Wideband (UWB) support (gen2 chip) Media playback
Watch Ultra 3
Temperature sensing (0.01˚ accuracy) Depth gauge (±1m accuracy) Ultra Wideband (UWB) support (gen2 chip) Emergency SOS via satellite
Type
Watch Series 10
Li-Ion 327 mAh
Watch Ultra 3
Li-Ion 599 mAh
Charging
Watch Series 10
Wireless, 0-80% in 30 min
Watch Ultra 3
Wireless, 0-80% in 45 min
Colors
Watch Series 10
Slate, Gold, Natural
Watch Ultra 3
Natural, Black
Models
Watch Series 10
A3001, A3002, A3003, A3206
Watch Ultra 3
A3281, A3282
SAR
Watch Series 10
1.08 W/kg (head)
Watch Ultra 3
1.16 W/kg (head)
SAR EU
Watch Series 10
0.26 W/kg (head) 0.83 W/kg (body)
Watch Ultra 3
1.19 W/kg (head)
Price
Watch Series 10
€ 579.00
Watch Ultra 3
€ 829.00