Screen size
D51 DiscoveryWinner: 2.0"+31%
Watch Ultimate Design Spring1.4"
Quick verdict
Watch Ultimate Design Spring leads the measured specs 10-5.
Measured wins
D51 Discovery
5
spec wins
Ties
1
equal specs
Watch Ultimate Design Spring
10
spec wins
Overall winner
Screen size
Technology
D51 Discovery
GSM
Watch Ultimate Design Spring
HSPA / LTE
2G bands
D51 Discovery
GSM 850 / 900 / 1800 / 1900
Watch Ultimate Design Spring
N/A
GPRS
D51 Discovery
Yes
Watch Ultimate Design Spring
-
EDGE
D51 Discovery
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
equal specsNFC
3.5mm jack
SD card
Stereo speakers
Watch Ultimate Design Spring
-
3G bands
D51 Discovery
-
Watch Ultimate Design Spring
HSDPA 850 / 900 / 1900 / 2100
4G bands
D51 Discovery
-
Watch Ultimate Design Spring
LTE
Speed
D51 Discovery
-
Watch Ultimate Design Spring
HSPA, LTE
Announced
D51 Discovery
2011
Watch Ultimate Design Spring
2026, April 20
Status
D51 Discovery
Discontinued
Watch Ultimate Design Spring
Available. Released 2026, May 08
Dimensions
D51 Discovery
114.5 x 50.5 x 16 mm (4.51 x 1.99 x 0.63 in)
Watch Ultimate Design Spring
42.9 x 42.9 x 10.8 mm (1.69 x 1.69 x 0.43 in)
Weight
D51 Discovery
106 g (3.74 oz)
Watch Ultimate Design Spring
91 g (3.21 oz)
SIM
D51 Discovery
Mini-SIM
Watch Ultimate Design Spring
eSIM
Other
D51 Discovery
IP57 dust/water resistant (up to 1m. and 30 min)
Watch Ultimate Design Spring
99 natural diamonds (0.8 carats) 5 ATM (maximum depth 40 meters when diving) IP68/IP69 dust tight and water resistant (high pressure water jets; immersible up to 1.5m for 30 min) ECG certified
Build
D51 Discovery
-
Watch Ultimate Design Spring
Sapphire crystal front, titanium alloy front shell, ceramic back
Type
D51 Discovery
TFT
Watch Ultimate Design Spring
LTPO2 AMOLED, 3000 nits (peak)
Size
D51 Discovery
2.0 inches, 12.4 cm2 (~21.4% screen-to-body ratio)
Watch Ultimate Design Spring
1.38 inches
Resolution
D51 Discovery
240 x 320 pixels, 4:3 ratio (~200 ppi density)
Watch Ultimate Design Spring
466 x 466 pixels (~338 ppi density)
Protection
D51 Discovery
-
Watch Ultimate Design Spring
Sapphire crystal glass
Card slot
D51 Discovery
microSD (dedicated slot)
Watch Ultimate Design Spring
No
Phonebook
D51 Discovery
Yes
Watch Ultimate Design Spring
-
Call records
D51 Discovery
Yes
Watch Ultimate Design Spring
-
Single
D51 Discovery
2 MP
Watch Ultimate Design Spring
-
Video
D51 Discovery
Yes
Watch Ultimate Design Spring
-
Other
D51 Discovery
No
Watch Ultimate Design Spring
-
Loudspeaker
D51 Discovery
Yes
Watch Ultimate Design Spring
Yes
3.5mm jack
D51 Discovery
-
Watch Ultimate Design Spring
No
WLAN
D51 Discovery
No
Watch Ultimate Design Spring
Wi-Fi 802.11 a/b/g/n/ac/6, dual-band
Bluetooth
D51 Discovery
2.1, A2DP
Watch Ultimate Design Spring
5.2, A2DP, LE
Positioning
D51 Discovery
GPS
Watch Ultimate Design Spring
GPS (L1+L5), GLONASS, GALILEO (L1+L5), QZSS (L1+L5), BDS
Radio
D51 Discovery
Stereo FM radio
Watch Ultimate Design Spring
No
USB
D51 Discovery
2.0
Watch Ultimate Design Spring
No
NFC
D51 Discovery
-
Watch Ultimate Design Spring
Yes
Sensors
D51 Discovery
Watch Ultimate Design Spring
Accelerometer, gyro, heart rate, barometer, compass, SpO2, thermometer (body temperature), X-TAP
Messaging
D51 Discovery
SMS, MMS
Watch Ultimate Design Spring
-
Games
D51 Discovery
Yes + downloadable
Watch Ultimate Design Spring
-
Java
D51 Discovery
Yes
Watch Ultimate Design Spring
-
Other
D51 Discovery
SNS applications Audio/video player Organizer Voice memo Predictive text input
Watch Ultimate Design Spring
Sleep apnea detection Heart Rate Variability (HRV) Arterial Stiffness Detection
Type
D51 Discovery
Removable Li-Ion 1000 mAh battery
Watch Ultimate Design Spring
Li-Ion 540 mAh
Stand-by
D51 Discovery
Up to 450 h
Watch Ultimate Design Spring
-
Talk time
D51 Discovery
Up to 5 h
Watch Ultimate Design Spring
-
Charging
D51 Discovery
-
Watch Ultimate Design Spring
Wireless
Colors
D51 Discovery
Black/Orange
Watch Ultimate Design Spring
Diamond Silver
Price
D51 Discovery
About 110 EUR
Watch Ultimate Design Spring
About 4000 EUR
Models
D51 Discovery
-
Watch Ultimate Design Spring
CHC-AL00
OS
D51 Discovery
-
Watch Ultimate Design Spring
HarmonyOS 6.1
Chipset
D51 Discovery
-
Watch Ultimate Design Spring
Kirin W80
Other
D51 Discovery
-
Watch Ultimate Design Spring
No