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Watch Series 7 vs Watch S1

Apple Watch Series 7 vs Xiaomi Watch S1

What Watch Series 7 does better (5) and where Watch S1 wins (2) — every spec side by side.

Apple · 2021Watch Series 7

5.8Score

5 advantages≈ $330

Xiaomi · 2021Watch S1

7.2Score

2 advantages≈ $290

Higher score

6.8Display7.5

9.2Health tracking5.0

6.4Sports & outdoor4.7

7.9Smart features5.9

6.0Build & durability4.7

Dimensions

Size comparison

Watch Series 7Watch S1

	Watch Series 7	Watch S1	Difference
Height	45 mm	46.5 mm	−1.5 mm
Width	38 mm	46.5 mm	−8.5 mm
Thickness	10.7 mm	11 mm	−0.3 mm
Weight	42 g	53 g	−11 g

Drawn to the same scale from the official dimensions (front and side).

Why is Watch Series 7 better than Watch S1?

LTE (cellular)Yes · Watch S1: No
Screen size1.9″ vs 1.43″+33%
Weight42.3 g vs 53 g+25%
eSIMYes · Watch S1: No
Thickness10.7 mm vs 11 mm+3%

Why is Watch S1 better than Watch Series 7?

Battery capacity309 mAh vs 470 mAh+52%
Resolution (width)396 px vs 466 px+18%

Specifications

Side by side

Only differences	Apple Watch Series 7≈ $3305.8	Xiaomi Watch S1≈ $2907.2
Design & durability
Case size	45 mm	46 mm
Weight	42.3 g	53 g
Thickness	10.7 mm	11 mm
Height	45 mm	46.5 mm
Width	38 mm	46.5 mm
Case material	Stainless steel	Stainless steel
Sapphire crystal	Yes	Yes
Lens / cover glass	Sapphire crystal glass	—
Strap material	Fluorelastomer	—
Water resistance	5 ATM	5 ATM
Ingress protection	IP6X	—
Water rating (maker)	50 m	—
Colours	Graphite, Gold, Silver	Black, Silver
Display
Screen size	1.9″	1.43″
Display technology	OLED	AMOLED
Panel	Retina LTPO OLED	AMOLED
AMOLED / OLED display	Yes	Yes
Always-on display	Yes	—
Resolution (width)	396 px	466 px
Resolution (height)	484 px	466 px
Pixel density	326 ppi	326 ppi
Peak brightness	1,000 nits	—
LTPO display	Yes	—
Refresh rate	60 Hz	60 Hz
Battery
Battery life (smartwatch mode)	0.8 days	—
Battery life (hours)	18 h	—
Battery capacity	309 mAh	470 mAh
Battery type	Li-Ion	Li-Po
Wireless charging	Yes	Yes
Charged in 30 min	53%	—
Health sensors
Optical heart rate	Yes	Yes
Blood oxygen (SpO2)	Yes	Yes
ECG	Yes	—
Skin temperature	Yes	—
Sleep tracking	Yes	—
Sensors	Accelerometer, gyro, heart rate, barometer, always-on altimeter, compass, SpO2, VO2max	Accelerometer, gyro, compass, barometer, heart rate, SpO2
Sports & navigation
Built-in GPS	Yes	Yes
Dual-band GPS	—	Yes
Satellite systems	GLONASS, GALILEO, BDS, QZSS	GLONASS, GALILEO, BDS, QZSS
Barometric altimeter	Yes	Yes
Compass	Yes	Yes
Multisport / triathlon mode	Yes	—
Connectivity
NFC payments	Yes	Yes
LTE (cellular)	Yes	No
eSIM	Yes	No
Wi-Fi	Wi-Fi 4	Wi-Fi 4
Bluetooth	5	5.2
Ultra Wideband	Yes	—
Smart features
Calls from the wrist	Yes	—
Speaker	Yes	Yes
Microphone	Yes	—
Voice assistant	Yes	—
Music on the watch	Yes	—
Storage	32 GB	—
RAM	1 GB	—
Platform
Operating system	watchOS 8.0	Proprietary OS
Platform	watchOS	Proprietary
Works with	iOS	—
Chipset	Apple S7	—