Screen size
equal specsWatch D21.8"
Watch Fit 41.8"
Quick verdict
Watch Fit 4 leads the measured specs 3-2.
Measured wins
Watch D2
2
spec wins
Ties
9
equal specs
Watch Fit 4
3
spec wins
Overall winner
Screen size
equal specsTechnology
Watch D2
No cellular connectivity
Watch Fit 4
No cellular connectivity
2G bands
Watch D2
N/A
Watch Fit 4
N/A
3G bands
Watch D2
N/A
Watch Fit 4
N/A
4G bands
Watch D2
N/A
Watch Fit 4
Resolution
equal specsRefresh rate
Peak brightness
Pixel density
equal specsCPU speed
RAM
Storage
Main camera
Front camera
Battery
Wired charging
equal specsWeight
Thickness
IP rating
Wi‑Fi
Bluetooth
equal specsUSB
5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
N/A
Speed
Watch D2
No
Watch Fit 4
No
GPRS
Watch D2
No
Watch Fit 4
No
EDGE
Watch D2
No
Watch Fit 4
No
Announced
Watch D2
2024, September 19
Watch Fit 4
2025, May 15
Status
Watch D2
Available. Released 2024, September 19
Watch Fit 4
Available. Released 2025, May 26
Dimensions
Watch D2
48 x 38 x 13.3 mm (1.89 x 1.50 x 0.52 in)
Watch Fit 4
43 x 38 x 9.5 mm (1.69 x 1.50 x 0.37 in)
Weight
Watch D2
40 g (1.41 oz)
Watch Fit 4
27 g (0.95 oz)
Build
Watch D2
Glass front, aluminum frame
Watch Fit 4
Glass front, aluminum alloy frame, plastic back
SIM
Watch D2
No
Watch Fit 4
No
Other
Watch D2
IP68 dust tight and water resistant Blood Pressure Measurement & ECG with built-in pump & inflatable strap ECG certified
Watch Fit 4
5 ATM water resistant
Type
Watch D2
AMOLED
Watch Fit 4
AMOLED, 2000 nits (peak)
Size
Watch D2
1.82 inches
Watch Fit 4
1.82 inches
Resolution
Watch D2
480 x 408 pixels (~347 ppi density)
Watch Fit 4
480 x 408 pixels (~347 ppi density)
OS
Watch D2
HarmonyOS 5.0
Watch Fit 4
-
Card slot
Watch D2
No
Watch Fit 4
No
Internal
Watch D2
Unspecified
Watch Fit 4
Unspecified
Phonebook
Watch D2
-
Watch Fit 4
No
Call records
Watch D2
-
Watch Fit 4
No
Other
Watch D2
No
Watch Fit 4
No
Loudspeaker
Watch D2
Yes
Watch Fit 4
Yes
3.5mm jack
Watch D2
No
Watch Fit 4
No
WLAN
Watch D2
No
Watch Fit 4
No
Bluetooth
Watch D2
5.2, LE
Watch Fit 4
5.2, LE
Positioning
Watch D2
GPS
Watch Fit 4
GPS (L1+L5), GALILEO (E1+E5a), QZSS (L1+L5), BDS (B1l+B1C), GLONASS
NFC
Watch D2
Yes (market/region dependent)
Watch Fit 4
Yes (gray model only)
Radio
Watch D2
No
Watch Fit 4
No
USB
Watch D2
No
Watch Fit 4
No
Sensors
Watch D2
Accelerometer, gyro, heart rate, SpO2, thermometer (skin temperature), differential pressure sensor, barometer
Watch Fit 4
Accelerometer, gyro, heart rate, SpO2, compass, barometer
Messaging
Watch D2
-
Watch Fit 4
Email, IM
Games
Watch D2
-
Watch Fit 4
No
Java
Watch D2
-
Watch Fit 4
No
Other
Watch D2
-
Watch Fit 4
Pulse wave arrhythmia analysis
Type
Watch D2
Li-Ion 524 mAh
Watch Fit 4
Li-Ion 400 mAh
Charging
Watch D2
5W wireless
Watch Fit 4
5W wireless
Colors
Watch D2
Black, Gold
Watch Fit 4
Black, Silver
Models
Watch D2
LCA-B11
Watch Fit 4
SYA-B19
Price
Watch D2
About 370 EUR
Watch Fit 4
$ 121.00 / € 104.76