idk.dev
Compare
Watch Series 8 vs Watch Ultra 2

Apple Watch Series 8 vs Apple Watch Ultra 2

What Watch Series 8 does better (3) and where Watch Ultra 2 wins (8) — every spec side by side.

Apple · 2022Watch Series 8

5.8Score

3 advantages≈ $360

Apple · 2023Watch Ultra 2

7.5Score

8 advantages≈ $470

Higher score

6.8Display9.4

2.4Battery life3.4

8.6Health tracking8.6

6.4Sports & outdoor3.1

7.9Smart features7.9

6.0Build & durability9.6

Dimensions

Size comparison

Watch Series 8Watch Ultra 2

	Watch Series 8	Watch Ultra 2	Difference
Height	45 mm	49 mm	−4 mm
Width	38 mm	44 mm	−6 mm
Thickness	10.7 mm	14.4 mm	−3.7 mm
Weight	42 g	61 g	−19 g

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

Why is Watch Series 8 better than Watch Ultra 2?

Weight42.3 g vs 61.4 g+45%
Thickness10.7 mm vs 14.4 mm+35%
Charged in 30 min53% vs 40%+32%

Why is Watch Ultra 2 better than Watch Series 8?

Battery life (smartwatch mode)0.8 days vs 1.5 days+88%
Peak brightness1,000 nits vs 3,000 nits3×
Water resistance5 ATM vs 10 ATM2×
Battery life (hours)18 h vs 36 h2×
Storage32 GB vs 64 GB2×
Battery capacity308 mAh vs 564 mAh+83%
Pixel density326 ppi vs 338 ppi+4%
Resolution (width)396 px vs 410 px+4%

Specifications

Side by side

Only differences	Apple Watch Series 8≈ $3605.8	Apple Watch Ultra 2≈ $4707.5
Design & durability
Case size	45 mm	49 mm
Weight	42.3 g	61.4 g
Thickness	10.7 mm	14.4 mm
Height	45 mm	49 mm
Width	38 mm	44 mm
Case material	Stainless steel	Titanium
Sapphire crystal	Yes	Yes
Lens / cover glass	Sapphire crystal glass	Sapphire crystal glass
Strap material	—	Textil
Water resistance	5 ATM	10 ATM
Ingress protection	IP6X	IP6X
Water rating (maker)	50 m	100 m
Military-grade (MIL-STD-810)	—	Yes
Colours	Graphite, Silver, Gold	Titanium, Black
Display
Screen size	1.9″	1.92″
Display technology	OLED	OLED
Panel	Retina LTPO OLED	Retina LTPO2 OLED
AMOLED / OLED display	Yes	Yes
Always-on display	Yes	Yes
Touchscreen	—	Yes
Resolution (width)	396 px	410 px
Resolution (height)	484 px	502 px
Pixel density	326 ppi	338 ppi
Peak brightness	1,000 nits	3,000 nits
LTPO display	Yes	Yes
Refresh rate	60 Hz	60 Hz
Battery
Battery life (smartwatch mode)	0.8 days	1.5 days
Battery life (hours)	18 h	36 h
Battery capacity	308 mAh	564 mAh
Battery type	Li-Ion	Li-Ion
Wireless charging	Yes	Yes
Charged in 30 min	53%	40%
Health sensors
Optical heart rate	Yes	Yes
Blood oxygen (SpO2)	Yes	Yes
ECG	Yes	Yes
Skin temperature	Yes	Yes
Temperature sensor	Yes	Yes
Sleep tracking	Yes	Yes
Sensors	Accelerometer, gyro, heart rate, barometer, always-on altimeter, compass, SpO2, VO2max, temperature (body)	Accelerometer, gyro, heart rate, barometer, always-on altimeter (-500m to 9000m), compass, SpO2, VO2max, temperature (body), temperature (water)
Sports & navigation
Built-in GPS	Yes	Yes
Dual-band GPS	—	Yes
Satellite systems	GLONASS, GALILEO, BDS, QZSS	GLONASS, GALILEO, BDS
Barometric altimeter	Yes	Yes
Compass	Yes	Yes
Multisport / triathlon mode	Yes	Yes
Dive mode	—	Yes
Connectivity
NFC payments	Yes	Yes
LTE (cellular)	Yes	Yes
eSIM	Yes	Yes
Wi-Fi	Wi-Fi 4	Wi-Fi 4
Bluetooth	5.3	5.3
Ultra Wideband	Yes	Yes
Smart features
Calls from the wrist	Yes	Yes
Speaker	Yes	Yes
Microphone	Yes	Yes
Voice assistant	Yes	Yes
Music on the watch	Yes	Yes
Storage	32 GB	64 GB
RAM	1 GB	—
Platform
Operating system	watchOS 9.0	watchOS 10
Platform	watchOS	watchOS
Works with	iOS	iOS
Chipset	Apple S8	Apple S9