Compare · Updated 31 Oct 2026
OnePlus Watch 3 46mm vs Samsung Galaxy Watch9
Get the OnePlus Watch 3. It lasts three times as long, has dual-band GPS and costs less. The Galaxy Watch9 is the thin, light one with more health checks, best with a Samsung phone.
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Which one is for you?
OnePlus Watch 3
Days between charges, no Samsung phone, less money? Then it's the OnePlus.
Is the OnePlus Watch 3 46mm worth it?Galaxy Watch9
Get the Watch9 if this sounds like you: a Samsung Galaxy phone, a thin light watch, more health checks.
Is the Samsung Galaxy Watch9 worth it?Key differences
OnePlus Watch 3Galaxy Watch9
Battery
Four to five days✓
A day to a day and a half
Works with
Any Android phone✓
Android; some features need a Samsung
Size
One big 46mm size
Thin and light, two sizes✓
Health extras
Fitness tracking, few safety checks
Sleep apnea checks, body composition✓
Related pages
How we reached this verdict
We compared independent expert reviews with the manufacturer's specifications, then checked it's sold at a major retailer where you live. We don't test products ourselves.
Sources: Tom's Guide, TechRadar, TechRadar, TechRadar, Tom's Guide, Tom's Guide, Android Central, manufacturer specifications.
Updated 31 Oct 2026How we decide