Watch Ultra 4 vs Watch SE 3
Side-by-side specs comparison — Watch family.
Network
Technology
GSM / HSPA / LTE / 5G
GSM / HSPA / LTE / 5G
Launch
Announced
2026, September 09
2025, September 09
Status
Coming soon. Exp. release 2026, September 18
Available. Released 2025, September 19
Body
Dimensions
49 x 44 x 12 mm (1.93 x 1.73 x 0.47 in)
44 x 38 x 10.7 mm (1.73 x 1.50 x 0.42 in)
Weight
63 g (2.22 oz)
26.4 g or 33 g (1.16 oz)
Build
Sapphire crystal front, ceramic and zirconia back, titanium frame (grade 5)
Glass front, plastic/sapphire crystal back, aluminum frame
SIM
eSIM
eSIM
Display
Type
Retina LTPO3 OLED, 3000 nits (peak)
Retina LTPO OLED, 1000 nits (peak)
Resolution
514 x 422 pixels (~326 ppi density)
448 x 368 pixels (~326 ppi density)
Protection
Sapphire crystal
Ion-X strengthened glass (2025 gen)
Platform
OS
watchOS 27
watchOS 26, upgradable to watchOS 26.4
Chipset
Apple S11
Apple S10
CPU
Dual-core
Dual-core
GPU
PowerVR
PowerVR
Memory
Internal
64GB
64GB
Main Camera
Cameras
No
No
Connectivity
Wi-Fi
Wi-Fi 802.11 b/g/n, dual-band
Wi-Fi 802.11 b/g/n
Bluetooth
5.3, A2DP, LE
5.3, A2DP, LE
GPS
GPS (L1+L5), GLONASS, GALILEO, BDS, QZSS
GPS, GLONASS, GALILEO, QZSS
NFC
Yes
Yes
USB
No
No
Features
Sensors
Accelerometer, gyro, always-on heart rate, barometer, always-on altimeter (-500m to 9000m), compass, SpO2, VO2max, temperature (body), temperature (water)
Accelerometer, gyro, heart rate (2nd gen), barometer, always-on altimeter, compass, temperature (body)
Battery
Battery
—
Li-Ion
Misc
Colors
Natural, Black
Midnight, Starlight
Price
€ 899.00
€ 225.00
More Watch Comparisons
Network
Technology
GSM / HSPA / LTE / 5G
GSM / HSPA / LTE / 5G
Launch
Announced
2026, September 09
2025, September 09
Status
Coming soon. Exp. release 2026, September 18
Available. Released 2025, September 19
Body
Dimensions
49 x 44 x 12 mm (1.93 x 1.73 x 0.47 in)
44 x 38 x 10.7 mm (1.73 x 1.50 x 0.42 in)
Weight
63 g (2.22 oz)
26.4 g or 33 g (1.16 oz)
Build
Sapphire crystal front, ceramic and zirconia back, titanium frame (grade 5)
Glass front, plastic/sapphire crystal back, aluminum frame
SIM
eSIM
eSIM
Display
Type
Retina LTPO3 OLED, 3000 nits (peak)
Retina LTPO OLED, 1000 nits (peak)
Resolution
514 x 422 pixels (~326 ppi density)
448 x 368 pixels (~326 ppi density)
Protection
Sapphire crystal
Ion-X strengthened glass (2025 gen)
Platform
OS
watchOS 27
watchOS 26, upgradable to watchOS 26.4
Chipset
Apple S11
Apple S10
CPU
Dual-core
Dual-core
GPU
PowerVR
PowerVR
Memory
Internal
64GB
64GB
Main Camera
Cameras
No
No
Connectivity
Wi-Fi
Wi-Fi 802.11 b/g/n, dual-band
Wi-Fi 802.11 b/g/n
Bluetooth
5.3, A2DP, LE
5.3, A2DP, LE
GPS
GPS (L1+L5), GLONASS, GALILEO, BDS, QZSS
GPS, GLONASS, GALILEO, QZSS
NFC
Yes
Yes
USB
No
No
Features
Sensors
Accelerometer, gyro, always-on heart rate, barometer, always-on altimeter (-500m to 9000m), compass, SpO2, VO2max, temperature (body), temperature (water)
Accelerometer, gyro, heart rate (2nd gen), barometer, always-on altimeter, compass, temperature (body)
Battery
Battery
—
Li-Ion
Misc
Colors
Natural, Black
Midnight, Starlight
Price
€ 899.00
€ 225.00