Who is the Xiaomi - Watch S4 for?
Budget-tier smartwatche. The 63.9 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 below 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.
Pros and cons at a glance
- ▲Always-on display — supported.
- ▲ECG — supported.
- ▲SpO2 — supported.
- ▲GPS — supported.
- ▲Cellular — supported.
- ▼Display size: 1.43 " (below category average).
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
Top 8 closest matchups in the Smartwatches category. Sorted by Mars Score proximity — these are the fights most worth your time.
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Frequently asked
What is the Mars Score for Xiaomi - Watch S4?+
Xiaomi - Watch S4 scores 63.9 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.
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