Wear OS Operating System — 8 Smartwatches Compared

Decision table

Wear OS Operating System: which one for what?

The 8 models on this page are scored only against each other, for the use you pick. Scores come from the spec sheets; no price and no advertising go in.

What will you use it for? Health Tracking Sport & Outdoors Battery Life Daily Use

Leads for Health Tracking: Galaxy Watch Ultra (2025)77%

Leads for Sport & Outdoors: OnePlus Watch 384%

Leads for Battery Life: OnePlus Watch 376%

Leads for Daily Use: Galaxy Watch8 40mm71%

#2#3#3#6
Galaxy Watch Ultra2Samsung
47 mm · up to 60 hours · Yes
77% 73% 60% 66%
Why it ranks here
- Editorial tag: Health Tracking
- ECG
- Blood oxygen sensor
Why it ranks here
- 60 hours of battery
- Dual-band GNSS
- Water resistance to 100 m
Why it ranks here
- 60 hours of battery
How long does the battery last?
Why it ranks here
- Editorial tag: Daily Use
- 47 mm case
#1#2#2#5
Galaxy Watch Ultra (2025)Samsung
47 mm · up to 60 hours · Yes
77% 73% 60% 67%
Why it ranks here
- Editorial tag: Health Tracking
- ECG
- Blood oxygen sensor
Why it ranks here
- 60 hours of battery
- Dual-band GNSS
- Water resistance to 100 m
Why it ranks here
- 60 hours of battery
How long does the battery last?
Why it ranks here
- Editorial tag: Daily Use
- 47 mm case
#7#8#8#4
Galaxy Watch9 44mmSamsung
44 mm · up to 30 hours · Yes
77% 58% 50% 68%
Why it ranks here
- Editorial tag: Health Tracking
- ECG
- Blood oxygen sensor
Why it ranks here
- Dual-band GNSS
- Water resistance to 50 m
Why it ranks here
Nothing stands out for this use; the score comes from overall balance.
How long does the battery last?
Why it ranks here
- Editorial tag: Daily Use
- 44 mm case
#6#7#7#2
Galaxy Watch9 40mmSamsung
40 mm · up to 30 hours · Yes
77% 58% 50% 70%
Why it ranks here
- Editorial tag: Health Tracking
- ECG
- Blood oxygen sensor
Why it ranks here
- Dual-band GNSS
- Water resistance to 50 m
Why it ranks here
Nothing stands out for this use; the score comes from overall balance.
How long does the battery last?
Why it ranks here
- Editorial tag: Daily Use
- 40 mm case
#4#5#5#3
Galaxy Watch8 44mmSamsung
44 mm · up to 40 hours · Yes
77% 64% 56% 68%
Why it ranks here
- Editorial tag: Health Tracking
- ECG
- Blood oxygen sensor
Why it ranks here
- Dual-band GNSS
- Water resistance to 50 m
Why it ranks here
Nothing stands out for this use; the score comes from overall balance.
How long does the battery last?
Why it ranks here
- Editorial tag: Daily Use
- 44 mm case
#3#4#4#1
Galaxy Watch8 40mmSamsung
40 mm · up to 40 hours · Yes
77% 64% 56% 71%
Why it ranks here
- Editorial tag: Health Tracking
- ECG
- Blood oxygen sensor
Why it ranks here
- Dual-band GNSS
- Water resistance to 50 m
Why it ranks here
Nothing stands out for this use; the score comes from overall balance.
How long does the battery last?
Why it ranks here
- Editorial tag: Daily Use
- 40 mm case
#5#6#6#7
Galaxy Watch8 Classic 46mmSamsung
46 mm · up to 30 hours · Yes
77% 58% 50% 65%
Why it ranks here
- Editorial tag: Health Tracking
- ECG
- Blood oxygen sensor
Why it ranks here
- Dual-band GNSS
- Water resistance to 50 m
Why it ranks here
Nothing stands out for this use; the score comes from overall balance.
How long does the battery last?
Why it ranks here
- Editorial tag: Daily Use
- 46 mm case
#8#1#1#8
OnePlus Watch 3OnePlus
47.6 mm · up to 120 hours · 5 ATM
57% 84% 76% 53%
Why it ranks here
- Blood oxygen sensor
Why it ranks here
- Editorial tag: Sport & Outdoors
- 120 hours of battery
- Dual-band GNSS
- Water resistance to 50 m
Why it ranks here
- Editorial tag: Battery Life
- 120 hours of battery
How long does the battery last?
Why it ranks here
- 47.6 mm case