Who is the Xiaomi - Watch S4 for?
Solid mid-pack smartwatche. The 76.3 score lands in B-tier (68–77) — competent across the board, with one or two specs holding it back.
A right buy if pricing matters and the trade-offs the formula penalizes don’t affect how you use the device. Compare it against the A-tier picks first.
Mars Score is computed from 17 measured specs against the transparent formula for the smartwatches category. No editorial picks, no paid placement.
Xiaomi - Watch S4: advantages & disadvantages
Measured against every smartwatches we track, here is where the Xiaomi - Watch S4 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.
- ▲Includes Cellular — a feature not every smartwatches offers.
- ▼Display size: 1.43 " — 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
- 1.43"
- Case size
- 47mm
- Battery life
- 360h
- OS
- HyperOS
All specifications
Design
- Case size
- 47 mm
- Weight
- 44 g
- Case material
- stainless steel
- Water resistance?
- 5 ATM
Display
- Display size
- 1.43 "
- 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?
- 360 h
- GPS
- true
- Cellular
- true
- NFC
- true
- OS
- HyperOS
Latest from the lab
All lab reports →Popular comparisons featuring the Xiaomi - Watch S4
The 12 closest matchups in the Smartwatches category, sorted by Mars Score proximity — the fights most worth your time.
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How Xiaomi - Watch S4 fits the Smartwatches field
Xiaomi - Watch S4 is listed in the Smartwatches catalog with a Mars Score of 76.3. It currently ranks 3 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
- 1.43 "
- Case size
- 47 mm
- Battery life
- 360 h
- OS
- HyperOS
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 Xiaomi - Watch S4?+
Xiaomi - Watch S4 scores 76.3 on the transparent Mars Score formula for smartwatches, computed from its published specs against the category's weighted normalization.
What category does Xiaomi - Watch S4 belong to?+
Xiaomi - Watch S4 is a Xiaomi smartwatche catalogued in the Smartwatches category.
When was Xiaomi - Watch S4 released?+
Xiaomi - Watch S4 was released on 2024-10-29.
What is the display size of Xiaomi - Watch S4?+
Xiaomi - Watch S4 has a display size of 1.43 ".
What is the case size of Xiaomi - Watch S4?+
Xiaomi - Watch S4 has a case size of 47 mm.
What is the battery life of Xiaomi - Watch S4?+
Xiaomi - Watch S4 has a battery life of 360 h.