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Watch Ultra 2 vs Redmi Watch 4

Apple Watch Ultra 2 vs Xiaomi Redmi Watch 4

What Watch Ultra 2 does better (8) and where Redmi Watch 4 wins (4) — every spec side by side.

Apple · 2023Watch Ultra 2

7.5Score

8 advantages≈ $470

Higher score

Xiaomi · 2023Redmi Watch 4

7.0Score

4 advantages≈ $75

9.4Display5.0

8.6Health tracking5.0

7.9Smart features6.5

9.6Build & durability8.2

Dimensions

Size comparison

Watch Ultra 2Redmi Watch 4

	Watch Ultra 2	Redmi Watch 4	Difference
Height	49 mm	47.6 mm	+1.4 mm
Width	44 mm	41.1 mm	+2.9 mm
Thickness	14.4 mm	10.5 mm	+3.9 mm
Weight	61 g	32 g	+30 g

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

Why is Watch Ultra 2 better than Redmi Watch 4?

Peak brightness3,000 nits vs 600 nits5×
Water resistance10 ATM vs 5 ATM2×
LTE (cellular)Yes · Redmi Watch 4: No
Storage64 GB vs 16 GB4×
eSIMYes · Redmi Watch 4: No
Battery capacity564 mAh vs 470 mAh+20%
Pixel density338 ppi vs 302 ppi+12%
Resolution (width)410 px vs 390 px+5%

Why is Redmi Watch 4 better than Watch Ultra 2?

Battery life (smartwatch mode)1.5 days vs 20 days13.3×
Weight61.4 g vs 31.5 g+95%
Screen size1.92″ vs 1.97″+3%
Thickness14.4 mm vs 10.5 mm+37%

Specifications

Side by side

Only differences	Apple Watch Ultra 2≈ $4707.5	Xiaomi Redmi Watch 4≈ $757.0
Design & durability
Case size	49 mm	48 mm
Weight	61.4 g	31.5 g
Thickness	14.4 mm	10.5 mm
Height	49 mm	47.6 mm
Width	44 mm	41.1 mm
Case material	Titanium	Aluminium
Sapphire crystal	Yes	—
Lens / cover glass	Sapphire crystal glass	—
Strap material	Textil	TPU
Water resistance	10 ATM	5 ATM
Ingress protection	IP6X	—
Water rating (maker)	100 m	50 m / 5 bar / 5 ATM
Military-grade (MIL-STD-810)	Yes	—
Colours	Titanium, Black	Black, White
Display
Screen size	1.92″	1.97″
Display technology	OLED	AMOLED
Panel	Retina LTPO2 OLED	AMOLED
AMOLED / OLED display	Yes	Yes
Always-on display	Yes	—
Touchscreen	Yes	Yes
Resolution (width)	410 px	390 px
Resolution (height)	502 px	450 px
Pixel density	338 ppi	302 ppi
Peak brightness	3,000 nits	600 nits
LTPO display	Yes	—
Refresh rate	60 Hz	60 Hz
Battery
Battery life (smartwatch mode)	1.5 days	20 days
Battery life (hours)	36 h	—
Battery capacity	564 mAh	470 mAh
Battery type	Li-Ion	Li-Po
Wireless charging	Yes	—
Charged in 30 min	40%	—
Health sensors
Optical heart rate	Yes	Yes
Blood oxygen (SpO2)	Yes	Yes
ECG	Yes	—
Skin temperature	Yes	—
Temperature sensor	Yes	—
Sleep tracking	Yes	Yes
Sensors	Accelerometer, gyro, heart rate, barometer, always-on altimeter (-500m to 9000m), compass, SpO2, VO2max, temperature (body), temperature (water)	Accelerometer, heart rate, compass, gyro, SpO2
Sports & navigation
Built-in GPS	Yes	Yes
Dual-band GPS	Yes	—
Satellite systems	GLONASS, GALILEO, BDS	GLONASS, GALILEO, BDS, QZSS
Barometric altimeter	Yes	—
Compass	Yes	Yes
Multisport / triathlon mode	Yes	—
Dive mode	Yes	—
Connectivity
NFC payments	Yes	Yes
LTE (cellular)	Yes	No
eSIM	Yes	No
Wi-Fi	Wi-Fi 4	—
Bluetooth	5.3	5.3
Ultra Wideband	Yes	—
Smart features
Calls from the wrist	Yes	—
Speaker	Yes	Yes
Microphone	Yes	—
Voice assistant	Yes	—
Music on the watch	Yes	—
Storage	64 GB	16 GB
Platform
Operating system	watchOS 10	HyperOS
Platform	watchOS	Proprietary
Works with	iOS	iOS, Android
Chipset	Apple S9	—