Who is the OnePlus Watch 3 for?
Entry-tier smartwatche. Below 58 on the Mars Score means several weighted specs trail the category leaders by a wide margin.
Only consider this if there is a specific reason — price, brand loyalty, ecosystem fit. The best-of page shows what your money buys a tier up.
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 Always-on display — a feature not every smartwatches offers.
- ▲Includes ECG — a feature not every smartwatches offers.
- ▲Includes SpO2 — a feature not every smartwatches offers.
- ▲Includes GPS — a feature not every smartwatches offers.
- ▼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 8 closest matchups in the Smartwatches category, sorted by Mars Score proximity — the fights most worth your time.
Browse by segment
Frequently asked
What is the Mars Score for OnePlus Watch 3?+
OnePlus Watch 3 scores 53.9 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.
vsMars is reader-supported. When you buy through links on our site, we may earn an affiliate commission at no extra cost to you. Learn more.