Screen size
iPhoneWinner: 3.5"+43%
Watch Ultra 32.0"
Quick verdict
Watch Ultra 3 leads the measured specs 8-6.
Measured wins
iPhone
6
spec wins
Ties
1
equal specs
Watch Ultra 3
8
spec wins
Overall winner
Screen size
Technology
iPhone
GSM
Watch Ultra 3
GSM / HSPA / LTE / 5G
2G bands
iPhone
GSM 850 / 900 / 1800 / 1900
Watch Ultra 3
GSM 850 / 900 / 1800 / 1900
GPRS
iPhone
Yes
Watch Ultra 3
-
EDGE
iPhone
Yes
Watch Ultra 3
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
5G support
NFC
3.5mm jack
SD card
equal specsStereo speakers
-
3G bands
iPhone
-
Watch Ultra 3
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - International, China, HK, HSDPA 850 / 1700(AWS) / 1900 / 2100 - USA, LATAM, Canada
4G bands
iPhone
-
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
iPhone
-
Watch Ultra 3
SA/NSA
Speed
iPhone
-
Watch Ultra 3
HSPA, LTE, 5G
Announced
iPhone
2007, January. Released 2007, June
Watch Ultra 3
2025, September 09
Status
iPhone
Discontinued
Watch Ultra 3
Available. Released 2025, September 19
Dimensions
iPhone
115 x 61 x 11.6 mm (4.53 x 2.40 x 0.46 in)
Watch Ultra 3
49 x 44 x 12 mm (1.93 x 1.73 x 0.47 in)
Weight
iPhone
135 g (4.76 oz)
Watch Ultra 3
61.6 g or 61.8 g (black) (2.15 oz)
SIM
iPhone
Mini-SIM
Watch Ultra 3
eSIM
Build
iPhone
-
Watch Ultra 3
Sapphire crystal front, ceramic/sapphire crystal back, titanium frame (grade 5)
Other
iPhone
-
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
iPhone
TFT
Watch Ultra 3
Retina LTPO3 OLED, 3000 nits (peak)
Size
iPhone
3.5 inches, 36.5 cm2 (~52.0% screen-to-body ratio)
Watch Ultra 3
1.98 inches
Resolution
iPhone
320 x 480 pixels, 3:2 ratio (~165 ppi density)
Watch Ultra 3
514 x 422 pixels (~326 ppi density)
Protection
iPhone
Corning Gorilla Glass, oleophobic coating
Watch Ultra 3
Sapphire crystal glass
Other
iPhone
-
Watch Ultra 3
Wide-angle OLED
OS
iPhone
iOS, upgradable to iOS 3.1.3
Watch Ultra 3
watchOS 26, upgradable to watchOS 26.2.1
CPU
iPhone
412 MHz ARM 11
Watch Ultra 3
Dual-core
GPU
iPhone
PowerVR MBX
Watch Ultra 3
PowerVR
Chipset
iPhone
-
Watch Ultra 3
Apple S10
Card slot
iPhone
No
Watch Ultra 3
No
Internal
iPhone
4/8/16GB
Watch Ultra 3
64GB
Single
iPhone
2 MP
Watch Ultra 3
-
Video
iPhone
No
Watch Ultra 3
-
Other
iPhone
No
Watch Ultra 3
-
Loudspeaker
iPhone
Yes
Watch Ultra 3
Yes, with dual speakers (86-decibel)
Alert types
iPhone
Vibration, proprietary ringtones
Watch Ultra 3
-
3.5mm jack
iPhone
Yes
Watch Ultra 3
No
WLAN
iPhone
Wi-Fi 802.11b/g
Watch Ultra 3
Wi-Fi 802.11 b/g/n, dual-band
Bluetooth
iPhone
2.0 (headset support only)
Watch Ultra 3
5.3, A2DP, LE
Positioning
iPhone
No
Watch Ultra 3
GPS (L1+L5), GLONASS, GALILEO, BDS, QZSS
Radio
iPhone
No
Watch Ultra 3
No
USB
iPhone
2.0
Watch Ultra 3
No
NFC
iPhone
-
Watch Ultra 3
Yes
Sensors
iPhone
Accelerometer, proximity
Watch Ultra 3
Accelerometer, gyro, heart rate, barometer, always-on altimeter (-500m to 9000m), compass, SpO2, VO2max, temperature (body), temperature (water)
Browser
iPhone
HTML (Safari)
Watch Ultra 3
-
Other
iPhone
Google Maps Audio/video player TV-out Organizer Document viewer Photo viewer Predictive text input
Watch Ultra 3
Temperature sensing (0.01˚ accuracy) Depth gauge (±1m accuracy) Ultra Wideband (UWB) support (gen2 chip) Emergency SOS via satellite
Type
iPhone
Li-Ion 1400 mAh, non-removable
Watch Ultra 3
Li-Ion 599 mAh
Charging
iPhone
-
Watch Ultra 3
Wireless, 0-80% in 45 min
Colors
iPhone
Black
Watch Ultra 3
Natural, Black
Models
iPhone
A1203, iPhone1,1
Watch Ultra 3
A3281, A3282
SAR
iPhone
0.97 W/kg (head) 0.38 W/kg (body)
Watch Ultra 3
1.16 W/kg (head)
SAR EU
iPhone
0.97 W/kg (head) 0.69 W/kg (body)
Watch Ultra 3
1.19 W/kg (head)
Price
iPhone
About 420 EUR
Watch Ultra 3
€ 829.00
Other
iPhone
-
Watch Ultra 3
No