Screen size
Watch Series 12Winner: 2.0"+2%
Watch Ultra1.9"
Quick verdict
Watch Series 12 leads the measured specs 7-3.
Measured wins
Watch Series 12
7
spec wins
Overall winner
Ties
4
equal specs
Watch Ultra
3
spec wins
Screen size
Technology
Watch Series 12
GSM / HSPA / LTE / 5G
Watch Ultra
GSM / HSPA / LTE
2G bands
Watch Series 12
GSM 850 / 900 / 1800 / 1900
Watch Ultra
GSM 850 / 900 / 1800 / 1900
3G bands
Watch Series 12
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
Watch Ultra
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - International, China, HK, HSDPA 850 / 1700(AWS) / 1900 / 2100 - USA, LATAM, Canada
4G bands
Watch Series 12
Resolution
Refresh rate
Peak brightness
equal specsPixel density
CPU speed
RAM
Storage
Main camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
5G support
NFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 38, 39, 40, 41, 66, 71
Watch Ultra
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 Series 12
1, 2, 3, 5, 7, 8, 12, 14, 20, 25, 26, 28, 38, 40, 41, 66, 71 SA/NSA
Watch Ultra
-
Speed
Watch Series 12
HSPA, LTE, 5G
Watch Ultra
HSPA, LTE
Announced
Watch Series 12
2026, September 09
Watch Ultra
2022, September 07
Status
Watch Series 12
Available. Released 2026, September 18
Watch Ultra
Available. Released 2022, September 23
Dimensions
Watch Series 12
46 x 40 x 9.7 mm - titanium47 x 41 x 9.9 mm - ceramic
Watch Ultra
49 x 44 x 14.4 mm (1.93 x 1.73 x 0.57 in)
Weight
Watch Series 12
36.5/41.7/42.8/44.9/51.3/52.9 g (1.31 oz)
Watch Ultra
61.3 g (2.15 oz)
Build
Watch Series 12
Sapphire crystal front, zirconia back, titanium case (grade 5) or ceramic case
Watch Ultra
Sapphire crystal front, ceramic/sapphire crystal back, titanium frame
SIM
Watch Series 12
eSIM
Watch Ultra
eSIM
Other
Watch Series 12
IP6X certified 50m water resistant ECG certified (region dependent SW application; HW available on all models) Depth gauge to 6m
Watch Ultra
IP6X certified 100m water resistant (WR100) 40m swimproof/diving (EN13319) MIL-STD-810H compliant ECG certified (region dependent SW application; HW available on all models)
Type
Watch Series 12
Retina LTPO3 OLED, 2000 nits (peak)
Watch Ultra
Retina LTPO OLED, 2000 nits (peak)
Size
Watch Series 12
1.96 inches
Watch Ultra
1.92 inches
Resolution
Watch Series 12
496 x 416 pixels (~326 ppi density)
Watch Ultra
502 x 410 pixels (~338 ppi density)
Protection
Watch Series 12
Sapphire crystal
Watch Ultra
Sapphire crystal glass
Other
Watch Series 12
Wide-angle OLED
Watch Ultra
-
OS
Watch Series 12
watchOS 27
Watch Ultra
watchOS 9.0, upgradable to watchOS 26.2.1
Chipset
Watch Series 12
Apple S11
Watch Ultra
Apple S8
CPU
Watch Series 12
Dual-core
Watch Ultra
Dual-core
GPU
Watch Series 12
PowerVR
Watch Ultra
PowerVR
Card slot
Watch Series 12
No
Watch Ultra
No
Internal
Watch Series 12
64GB
Watch Ultra
32GB
Other
Watch Series 12
No
Watch Ultra
No
Loudspeaker
Watch Series 12
Yes
Watch Ultra
Yes, with dual speakers (86-decibel)
3.5mm jack
Watch Series 12
No
Watch Ultra
No
WLAN
Watch Series 12
Wi-Fi 802.11 b/g/n, dual-band
Watch Ultra
Wi-Fi 802.11 b/g/n, dual-band
Bluetooth
Watch Series 12
5.3, A2DP, LE
Watch Ultra
5.3, A2DP, LE
Positioning
Watch Series 12
GPS, GLONASS, GALILEO, QZSS, BDS
Watch Ultra
GPS (L1+L5), GLONASS, GALILEO, BDS
NFC
Watch Series 12
Yes
Watch Ultra
Yes
Radio
Watch Series 12
No
Watch Ultra
No
USB
Watch Series 12
No
Watch Ultra
No
Sensors
Watch Series 12
Accelerometer, gyro, always-on heart rate, barometer, always-on altimeter, compass, SpO2, VO2max, temperature (body), temperature (water)
Watch Ultra
Accelerometer, gyro, heart rate, barometer, always-on altimeter, compass, SpO2, VO2max, temperature (body), temperature (water)
Other
Watch Series 12
Health Sensing System: third‑generation electrical heart sensor, always‑on optical heart sensor, blood oxygen sensor, temperature sensor Temperature sensing (0.01˚ accuracy) Ultra Wideband (UWB) support (gen2 chip) Media playback
Watch Ultra
Temperature sensing (0.01˚ accuracy) Depth gauge (±1m accuracy) Ultra Wideband (UWB) support
Type
Watch Series 12
Li-Ion
Watch Ultra
Li-Ion 542 mAh
Charging
Watch Series 12
Wireless, 0-80% in 30 min
Watch Ultra
Wireless, 0-80% in 60 min
Colors
Watch Series 12
Radiant Gold Titanium, Natural Titanium, Silver Titanium (Hermès only), Pearl White Ceramic, Night Blue Ceramic
Watch Ultra
Titanium
Models
Watch Series 12
A3582, A3587
Watch Ultra
A2684, A2622, A2859, watch6,18
Price
Watch Series 12
€ 439.00
Watch Ultra
About 550 EUR
SAR EU
Watch Series 12
-
Watch Ultra
0.35 W/kg (head) 0.60 W/kg (body)