Who is the OnePlus Watch 3 for?
Budget-tier smartwatche. The 65.7 score sits in C-tier (58–67) — the formula flags meaningful weaknesses against premium peers.
Reasonable if cost is the deciding factor and the spec weaknesses don’t matter for your use. Check the spec table carefully before buying.
Mars Score is computed from 17 measured specs against the transparent formula for the smartwatches category. No editorial picks, no paid placement.
OnePlus Watch 3: advantages & disadvantages
Measured against every smartwatches we track, here is where the OnePlus Watch 3 pulls ahead — and where it gives ground.
- ▲Includes ECG — a feature not every smartwatches offers.
- ▲Includes Always-on display — a feature not every smartwatches offers.
- ▲Includes SpO2 — a feature not every smartwatches offers.
- ▲Includes GPS — a feature not every smartwatches offers.
- ▼Weight: 81 g — among the weakest in the smartwatches category.
- ▼No Cellular — a feature most stronger smartwatches include.
- ▼Battery life: 120 h — below the typical smartwatches.
Pros are specs scoring ≥75% of the category normalization range. Cons are ≤35%. Derived from the Mars Score formula — no hand-curated lists.
At a glance
- Display size
- 1.5"
- Case size
- 46.5mm
- Battery life
- 120h
- OS
- WearOS
All specifications
Design
- Case size
- 46.5 mm
- Weight
- 81 g
- Case material
- stainless steel
- Water resistance?
- 5 ATM
Display
- Display size
- 1.5 "
- Always-on display
- true
- Peak brightness?
- 2200 nits
Health & Fitness
- ECG
- true
- SpO2
- true
- Temperature sensor
- true
- Sleep tracking
- true
- Blood pressure
- false
Battery & Connectivity
- Battery life?
- 120 h
- GPS
- true
- Cellular
- false
- NFC
- true
- OS
- WearOS
Latest from the lab
All lab reports →Popular comparisons featuring the OnePlus Watch 3
The 12 closest matchups in the Smartwatches category, sorted by Mars Score proximity — the fights most worth your time.
Browse by segment
How OnePlus Watch 3 fits the Smartwatches field
OnePlus Watch 3 is listed in the Smartwatches catalog with a Mars Score of 65.7. It currently ranks 20 of 24 products in this category by Mars Score.This page is most useful when you match the product's strongest measurable specifications to your own workload instead of treating one number as a universal recommendation.
Key specifications to check
- Display size
- 1.5 "
- Case size
- 46.5 mm
- Battery life
- 120 h
- OS
- WearOS
Values are shown exactly as stored in the current catalog. A dash means the value is not available; it is not a zero and is not treated as a win or loss.
Who should consider it?
Start with the priorities represented by display size, case size, battery life. Buyers who value those dimensions should compare this product against the closest same-category alternatives below, then verify regional pricing, warranty, and configuration before purchase.
Closest alternatives
Frequently asked
What is the Mars Score for OnePlus Watch 3?+
OnePlus Watch 3 scores 65.7 on the transparent Mars Score formula for smartwatches, computed from its published specs against the category's weighted normalization.
What category does OnePlus Watch 3 belong to?+
OnePlus Watch 3 is a OnePlus smartwatche catalogued in the Smartwatches category.
When was OnePlus Watch 3 released?+
OnePlus Watch 3 was released on 2025-02-25.
What is the display size of OnePlus Watch 3?+
OnePlus Watch 3 has a display size of 1.5 ".
What is the case size of OnePlus Watch 3?+
OnePlus Watch 3 has a case size of 46.5 mm.
What is the battery life of OnePlus Watch 3?+
OnePlus Watch 3 has a battery life of 120 h.