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Watch Match
Head-to-head · smartwatch

OnePlus Watch 3 vs Samsung Galaxy Watch 8

OnePlus Watch 3 (2025, listed at $329) and Samsung Galaxy Watch 8 (2025, listed at $329) are both smartwatches, so the choice comes down to specifics.

Specs last updated · prices are list prices

Leads on raw specs: Samsung Galaxy Watch 8(1–2)
OnePlus Watch 3
smartwatch

OnePlus Watch 3

Wear OS 5 with Snapdragon W5 + BES2800 dual chips — 5-day smart battery and 16-day power-saver.

$329list price
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Full specs
Samsung Galaxy Watch 8
smartwatch

Samsung Galaxy Watch 8

Galaxy AI on the wrist — antioxidant index, vascular load, brighter 3,000-nit AMOLED.

$329list price
Check price on AmazonOr buy direct from Samsung
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Full specs

The verdict

On the numbers we track, OnePlus Watch 3 wins on battery life (5 days vs 1.7 days); Samsung Galaxy Watch 8 wins on weight (34 g vs 49 g) and tracked features (7 vs 6).

Bottom line: on raw specs the Samsung Galaxy Watch 8 leads 2 to 1, but five spec categories are only a starting point. Match it to your phone, your main sport and your budget before you decide, or run the free quiz to see how each ranks for your answers.

Spec by spec

OnePlus Watch 3 and Samsung Galaxy Watch 8 specifications
SpecOnePlus Watch 3Samsung Galaxy Watch 8
Battery (rated)5 days1.7 days
Weight49 g34 g
List price$329$329
Water rating5ATM5ATM
Tracked features67
Case size47 mm44 mm
DisplayAMOLEDAMOLED
Works withAndroid onlyAndroid only
Listed best foreveryday wellness, health tracking and runningeveryday wellness, health tracking, gym and strength work and running
Released20252025

Trophy marks the better value on the five measurable specs. Battery is the manufacturer's rating, not our test. How we score is on the methodology page.

Feature overlap

Both have (6)

  • built-in GPS
  • ECG
  • blood-oxygen (SpO₂)
  • on-device music
  • AMOLED display
  • swim tracking

Only OnePlus Watch 3 (0)

Nothing unique.

Only Samsung Galaxy Watch 8 (1)

  • contactless payments

Which one should you pick?

Pick the OnePlus Watch 3 if…

  • You want fewer charges: about 5 days per charge vs 1.7 days.

Skip it if…

  • • You use an iPhone — it needs an Android phone for full features.
  • • You have a small wrist (under about 160 mm) — the 47 mm case we list is large (check whether a smaller size is sold).

Pick the Samsung Galaxy Watch 8 if…

  • You want a lighter watch: 34 g vs 49 g.
  • You need contactless payments, which the OnePlus Watch 3 does not list.
  • Your main use is gym and strength work: it is listed for that and the OnePlus Watch 3 is not.

Skip it if…

  • • You use an iPhone — it needs an Android phone for full features.
  • • You do not want to charge often — it is rated for about 1.7 days per charge.

Frequently asked questions

Which has better battery life, the OnePlus Watch 3 or the Samsung Galaxy Watch 8?

The OnePlus Watch 3 has the longer rated battery life: about 5 days per charge against 1.7 days. These are manufacturer ratings; heavy GPS, always-on display and cellular use will cut both.

Which is cheaper, the OnePlus Watch 3 or the Samsung Galaxy Watch 8?

They have the same list price ($329) in our database. Check Amazon for today's price.

Do the OnePlus Watch 3 and Samsung Galaxy Watch 8 work with iPhone and Android?

Yes, they have the same phone support: Android only.

Which is better for swimming, the OnePlus Watch 3 or the Samsung Galaxy Watch 8?

Neither has an edge on water rating: both are rated 5ATM. 5ATM is suitable for showering and pool swimming, but not for high-speed water sports or diving.

Not sure either is right for you?

Nine questions about your phone, sport, wrist and budget, scored against all of our watches with the reasoning shown.

Take the free quiz

Where each one ranks #1 in our quiz

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