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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