Apple Watch Sport 38mm (1st gen) vs Asus Zenfone 4 Pro ZS551KL

Apple Watch Sport 38mm (1st gen)

Asus Zenfone 4 Pro ZS551KL

Network
2G network

N/A

GSM 850, 900, 1800, 1900
3G network

-

HSDPA 800, 850, 900, 1700(AWS), 1800, 1900, 2100
4G network

-

LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 17(700), 19(800), 20(800), 28(700), 38(2600), 39(1900), 40(2300), 41(2500) - Global, Taiwan; LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 17(700), 18(800), 19(800), 20(800), 26(850), 28(700), 29(700), 30(2300), 38(2600), 39(1900), 41(2500) - US, Canada, Brazil; LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 17(700), 18(800), 19(800), 20(800), 26(850), 28(700), 29(700), 30(2300), 38(2600), 39(1900), 40(2300), 41(2500) - India
HSDPA speed

-

42.2 Mbps
HSUPA speed

-

5.76 Mbps
LTE-A speed

-

LTE-A, (3CA) Cat12, 600 Mbps download, 150 Mbps upload
GPRS

No

Yes
EDGE

No

Yes

Design
Build

Aluminum/Composite back

-
SIM

No

Hybrid Dual SIM (Nano-SIM, dual stand-by)
Height

38.6 mm

156.9 mm
Width

33.3 mm

75.6 mm
Thickness

10.5 mm

7.6 mm
Weight

25 g

175 g
Waterproof

IPX7 certified, 1 m and 30 minutes

-
Colors

Apricot, Blue, Blue; Gray/Black; Rose Gold/Lavender, Orange, Pink/Royal Blue/Gold&Red/Black Woven Nylon, Royal Blue, Silver/White, Stone; Gold/White, Yellow

Moonlight white, Pure Black

Connectivity
WLAN

Wi-Fi 802.11b, 802.11g, 802.11n

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac
WLAN WiFi Hotspot

-

Yes
WLAN WiFi Direct

-

Yes
WLAN WiFi Dual Band

-

Yes
USB

Type-C reversible connector
Bluetooth

v4.0

v5.0
Bluetooth A2DP

-

Yes
bluetooth LE

Yes

Yes
Bluetooth EDR

-

Yes
Bluetooth AptX

-

Yes
Infrared

-

Yes
NFC

Yes

Yes
GPS

No

Yes, with A-GPS
GLONASS

-

Yes
GALILEO

-

Yes
BDS

-

Yes

Features
Messaging SMS

SMS(threaded view)

SMS(threaded view)
Messaging MMS

-

MMS
Messaging Email

Email

Email
Messaging IM

IM

IM
Messaging Push Email

-

Push Email
Messaging Push Mail

Push Mail

-
Java

No

No
Sensors

Accelerometer, gyro, heart rate

Fingerprint (front-mounted), accelerometer, color spectrum, compass, gyro, proximity

Main camera
Camera type

-

Dual
Main camera

12 MP, f/1.7 , 25 mm, 2x optical zoom
16 MP, 50 mm
Primary camera video

-

2160p@30fps, 1080p@30/60fps, 1080p@120fps, 720p@240fps
Primary camera Autofocus

-

laser/phase detection autofocus
Primary camera flash

-

LED flash
Primary camera optical image stabilization

-

4-axis optical image stabilization
Camera features

-

25mm (1/2.55" sensor size, 1.4 µm pixel size), 50mm (1/3.1" sensor size, 1.0 µm pixel size), geo-tagging, touch focus, face detection, HDR, panorama