Screen size
Watch SE 31.8"
Watch Ultra 3Winner: 2.0"+10%
Quick verdict
Watch Ultra 3 leads the measured specs 4-2.
Measured wins
Watch SE 3
2
spec wins
Ties
7
equal specs
Watch Ultra 3
4
spec wins
Overall winner
Screen size
Technology
Watch SE 3
GSM / HSPA / LTE / 5G
Watch Ultra 3
GSM / HSPA / LTE / 5G
2G bands
Watch SE 3
GSM 850 / 900 / 1800 / 1900
Watch Ultra 3
GSM 850 / 900 / 1800 / 1900
3G bands
Watch SE 3
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
equal specsCPU speed
RAM
Storage
equal specsMain camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
equal specsUSB
5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
Watch SE 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
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
5G bands
Watch SE 3
SA/NSA
Watch Ultra 3
SA/NSA
Speed
Watch SE 3
HSPA, LTE, 5G
Watch Ultra 3
HSPA, LTE, 5G
Announced
Watch SE 3
2025, September 09
Watch Ultra 3
2025, September 09
Status
Watch SE 3
Available. Released 2025, September 19
Watch Ultra 3
Available. Released 2025, September 19
Dimensions
Watch SE 3
44 x 38 x 10.7 mm (1.73 x 1.50 x 0.42 in)
Watch Ultra 3
49 x 44 x 12 mm (1.93 x 1.73 x 0.47 in)
Weight
Watch SE 3
26.4 g or 33 g (1.16 oz)
Watch Ultra 3
61.6 g or 61.8 g (black) (2.15 oz)
Build
Watch SE 3
Glass front, plastic/sapphire crystal back, aluminum frame
Watch Ultra 3
Sapphire crystal front, ceramic/sapphire crystal back, titanium frame (grade 5)
SIM
Watch SE 3
eSIM
Watch Ultra 3
eSIM
Other
Watch SE 3
50m water resistant
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 SE 3
Retina LTPO OLED, 1000 nits (peak)
Watch Ultra 3
Retina LTPO3 OLED, 3000 nits (peak)
Size
Watch SE 3
1.78 inches
Watch Ultra 3
1.98 inches
Resolution
Watch SE 3
448 x 368 pixels (~326 ppi density)
Watch Ultra 3
514 x 422 pixels (~326 ppi density)
Protection
Watch SE 3
Ion-X strengthened glass (2025 gen)
Watch Ultra 3
Sapphire crystal glass
Other
Watch SE 3
-
Watch Ultra 3
Wide-angle OLED
OS
Watch SE 3
watchOS 26, upgradable to watchOS 26.2.1
Watch Ultra 3
watchOS 26, upgradable to watchOS 26.2.1
Chipset
Watch SE 3
Apple S10
Watch Ultra 3
Apple S10
CPU
Watch SE 3
Dual-core
Watch Ultra 3
Dual-core
GPU
Watch SE 3
PowerVR
Watch Ultra 3
PowerVR
Card slot
Watch SE 3
No
Watch Ultra 3
No
Internal
Watch SE 3
64GB
Watch Ultra 3
64GB
Other
Watch SE 3
No
Watch Ultra 3
No
Loudspeaker
Watch SE 3
Yes
Watch Ultra 3
Yes, with dual speakers (86-decibel)
3.5mm jack
Watch SE 3
No
Watch Ultra 3
No
WLAN
Watch SE 3
Wi-Fi 802.11 b/g/n
Watch Ultra 3
Wi-Fi 802.11 b/g/n, dual-band
Bluetooth
Watch SE 3
5.3, A2DP, LE
Watch Ultra 3
5.3, A2DP, LE
Positioning
Watch SE 3
GPS, GLONASS, GALILEO, QZSS
Watch Ultra 3
GPS (L1+L5), GLONASS, GALILEO, BDS, QZSS
NFC
Watch SE 3
Yes
Watch Ultra 3
Yes
Radio
Watch SE 3
No
Watch Ultra 3
No
USB
Watch SE 3
No
Watch Ultra 3
No
Sensors
Watch SE 3
Accelerometer, gyro, heart rate (2nd gen), barometer, always-on altimeter, compass, temperature (body)
Watch Ultra 3
Accelerometer, gyro, heart rate, barometer, always-on altimeter (-500m to 9000m), compass, SpO2, VO2max, temperature (body), temperature (water)
Other
Watch SE 3
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 SE 3
Li-Ion
Watch Ultra 3
Li-Ion 599 mAh
Charging
Watch SE 3
Wireless, 80% in 45 min
Watch Ultra 3
Wireless, 0-80% in 45 min
Colors
Watch SE 3
Midnight, Starlight
Watch Ultra 3
Natural, Black
Models
Watch SE 3
A3325, A3324, A3328, A3326, A3327, A3329, A3391, A3392
Watch Ultra 3
A3281, A3282
SAR
Watch SE 3
1.18 W/kg (head)
Watch Ultra 3
1.16 W/kg (head)
SAR EU
Watch SE 3
0.42 W/kg (head)
Watch Ultra 3
1.19 W/kg (head)
Price
Watch SE 3
€ 244.00
Watch Ultra 3
€ 829.00