Screen size
Impulse 4GWinner: 3.8"+52%
Watch Fit 41.8"
Quick verdict
Impulse 4G and Watch Fit 4 are close on the measured specs.
Measured wins
Impulse 4G
7
spec wins
Ties
1
equal specs
Watch Fit 4
7
spec wins
Screen size
Technology
Impulse 4G
GSM / HSPA
Watch Fit 4
No cellular connectivity
2G bands
Impulse 4G
GSM 850 / 900 / 1800 / 1900
Watch Fit 4
N/A
3G bands
Impulse 4G
HSDPA 850 / 1900 / 2100
Watch Fit 4
N/A
Speed
Impulse 4G
HSPA 14.4/5.76 Mbps
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 Fit 4
No
4G bands
Impulse 4G
-
Watch Fit 4
N/A
GPRS
Impulse 4G
-
Watch Fit 4
No
EDGE
Impulse 4G
-
Watch Fit 4
No
Announced
Impulse 4G
2011, September. Released 2011, September
Watch Fit 4
2025, May 15
Status
Impulse 4G
Discontinued
Watch Fit 4
Available. Released 2025, May 26
Dimensions
Impulse 4G
120 x 65 x 11.6 mm (4.72 x 2.56 x 0.46 in)
Watch Fit 4
43 x 38 x 9.5 mm (1.69 x 1.50 x 0.37 in)
Weight
Impulse 4G
130 g (4.59 oz)
Watch Fit 4
27 g (0.95 oz)
SIM
Impulse 4G
Mini-SIM
Watch Fit 4
No
Build
Impulse 4G
-
Watch Fit 4
Glass front, aluminum alloy frame, plastic back
Other
Impulse 4G
-
Watch Fit 4
5 ATM water resistant
Type
Impulse 4G
TFT
Watch Fit 4
AMOLED, 2000 nits (peak)
Size
Impulse 4G
3.8 inches, 41.1 cm2 (~52.7% screen-to-body ratio)
Watch Fit 4
1.82 inches
Resolution
Impulse 4G
480 x 800 pixels, 5:3 ratio (~246 ppi density)
Watch Fit 4
480 x 408 pixels (~347 ppi density)
OS
Impulse 4G
Android 2.2 (Froyo)
Watch Fit 4
-
Chipset
Impulse 4G
Qualcomm MSM7230
Watch Fit 4
-
CPU
Impulse 4G
800 MHz Scorpion
Watch Fit 4
-
GPU
Impulse 4G
Adreno 205
Watch Fit 4
-
Card slot
Impulse 4G
microSDHC (dedicated slot)
Watch Fit 4
No
Internal
Impulse 4G
512MB RAM
Watch Fit 4
Unspecified
Phonebook
Impulse 4G
-
Watch Fit 4
No
Call records
Impulse 4G
-
Watch Fit 4
No
Single
Impulse 4G
5 MP, AF
Watch Fit 4
-
Features
Impulse 4G
LED flash
Watch Fit 4
-
Video
Impulse 4G
720p@30fps
Watch Fit 4
-
Other
Impulse 4G
No
Watch Fit 4
-
Loudspeaker
Impulse 4G
Yes
Watch Fit 4
Yes
3.5mm jack
Impulse 4G
Yes
Watch Fit 4
No
WLAN
Impulse 4G
Wi-Fi 802.11 b/g/n
Watch Fit 4
No
Bluetooth
Impulse 4G
2.1, A2DP, EDR
Watch Fit 4
5.2, LE
Positioning
Impulse 4G
GPS, A-GPS
Watch Fit 4
GPS (L1+L5), GALILEO (E1+E5a), QZSS (L1+L5), BDS (B1l+B1C), GLONASS
Radio
Impulse 4G
No
Watch Fit 4
No
USB
Impulse 4G
microUSB 2.0
Watch Fit 4
No
NFC
Impulse 4G
-
Watch Fit 4
Yes (gray model only)
Sensors
Impulse 4G
Accelerometer, proximity, compass
Watch Fit 4
Accelerometer, gyro, heart rate, SpO2, compass, barometer
Other
Impulse 4G
MP3/WAV/eAAC+ player MP4/H.264 player Organizer Document viewer Photo viewer/editor Voice memo/dial Predictive text input
Watch Fit 4
Pulse wave arrhythmia analysis
Messaging
Impulse 4G
-
Watch Fit 4
Email, IM
Games
Impulse 4G
-
Watch Fit 4
No
Java
Impulse 4G
-
Watch Fit 4
No
Type
Impulse 4G
Removable Li-Ion 1500 mAh battery
Watch Fit 4
Li-Ion 400 mAh
Stand-by
Impulse 4G
Up to 240 h
Watch Fit 4
-
Talk time
Impulse 4G
Up to 4 h
Watch Fit 4
-
Charging
Impulse 4G
-
Watch Fit 4
5W wireless
Colors
Impulse 4G
Black
Watch Fit 4
Black, Silver
Price
Impulse 4G
About 80 EUR
Watch Fit 4
$ 121.00 / € 104.76
Models
Impulse 4G
-
Watch Fit 4
SYA-B19
Other
Impulse 4G
-
Watch Fit 4
No