Health, Fitness & Wellness › Fitness Trackers & Smartwatches
Watch S4
Model timeline
Rectangular smartwatch with fitness tracking
More about it ↓Quick take
In short: what each side says
AI panel · Reviewers · The press — each opened up in full further down ↓
Best on Grok (avg #23.7), weakest on ChatGPT (#29.5)
Reviewers agree the Watch S4 is a comfortable, good-looking fitness watch with strong battery life and a bright display, though sleep tracking and notification handling lag behind more expensive rivals.
4 of 7 outlets recommend it; Wareable dissents.
The juries split — Divided. Check both sides before you commit.
Main competitors
Top rivals in Fitness Trackers & Smartwatches.
About
What it is.
Xiaomi's Watch S4 is a round-faced smartwatch in the Watch S line, built around a 41mm case with a black fluoro rubber strap. Its AMOLED display uses a square pixel grid for sharp rendering of watch faces, notifications, and workout metrics, and the interface runs on Xiaomi's HyperOS.
Onboard sensors include an optical heart rate monitor and GPS, positioning it for runners and everyday exercisers who want location-tagged activity logs without a phone tether. IP68 sealing covers sweat, rain, and washing exposure, and the case is styled for daily wear as much as gym sessions.
The verdict
Owners consistently praise the Xiaomi Watch S4's strong performance and iOS compatibility, though the small sample size of ratings limits broader confidence in its fitness capabilities.
Act one
What the machines think.
Several AI models read the category and place this product — model by model, list by list, over time.
Model by model?
How each AI sees it.
Best on Grok (avg #23.7), weakest on ChatGPT (#29.5) Averaging across the AI panel, Watch S4 sits around #25.6 this snapshot.
Grok
#23.7
3 appearances · best #20
Claude
#24.0
2 appearances · best #22
GPT
#29.5
2 appearances · best #29
Perplexity
—
Didn’t rank Watch S4 this snapshot.
AI Mode
Didn’t rank Watch S4 this snapshot.
Footprint?
Every intent it shows up in.
sorted by current rank · weakest: Best Fitness Trackers (#28 of 30)
Rank trajectory?
Weeks of movement.
Act two · ★ new
What the people say.
The same product, judged by the owners who bought and filmed it — what they praise, what they knock, who it's for.
Video reviews?
What reviewers actually say.
AI summary of 5 reviews · as of Aug 2026
Reviewers agree the Watch S4 is a comfortable, good-looking fitness watch with strong battery life and a bright display, though sleep tracking and notification handling lag behind more expensive rivals.
What they praise
- Bright, sharp AMOLED display that stays legible outdoors
- Long battery life, often lasting close to a week or more with typical use
- Comfortable, lightweight build with swappable bezels and quick-release straps
- Smooth, responsive interface with a useful rotating crown and haptic feedback
- Solid heart-rate and GPS accuracy during workouts
What they knock
- Sleep tracking is inconsistent and sometimes inaccurate, at least at launch
- Notification support is basic, with no reply or archive options
- Charging cable uses an older USB-A connector rather than USB-C
- Third-party strap options are limited and the stock strap release mechanism feels insecure
Synthesised from: Chigz Tech Reviews · Tech Spurt · TechMishka · Matheus Kise · Chris Wilmshurst
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TechMishka
🔥 Xiaomi Watch S4: the BEST smartwatch under R$1,000?
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What the press says?
Where the established press lands.
The press leans positive
4 of 7 outlets recommend it; Wareable dissents.
Across 7 independent outlets · published expert reviews · last 18 months
Act three · ★ new
Do they agree?
Put the machine's rank and the owners' score in one frame, settle it with a verdict, and answer the only question that matters: should you buy it?
The disagreement
Where the juries actually split.
Grok
#24avg rank
ranks it highest of the panel
ChatGPT
#30avg rank
the most sceptical model
critics 4.0/5 and press 4/7 sit outside the models' split.
critics 4.0/5press 4/7Per-model average ranks from this week's panel?
The bottom line
So should you buy it?
The AIs’ #20 pick in Fitness Trackers & Smartwatches. Critics back it at 4.0 / 5 — the machines place it at #20, outside their top picks.
Frequent rivals?
What it competes against.
- VerticalSuuntoXiaomi leads 2–1 · 3 sharedRead
- ScanWatch 2WithingsWithings leads 2–1 · 3 sharedRead
- Oura Ring 5OuraOura leads 2–1 · 3 sharedRead
- Apex 2 ProCorosCoros leads 2–1 · 3 sharedRead
- BalanceAmazfitAmazfit leads 2–1 · 3 sharedRead
- Watch SE (2nd Gen)AppleApple leads 2–1 · 3 sharedRead
- Active 2AmazfitAmazfit leads 2–1 · 3 sharedRead
Frequently asked
What buyers want to know.
How does the Xiaomi Watch S4 perform day-to-day?
Owners rate its performance very highly. Buyers describe performance and iOS compatibility as the watch's strongest points.
Does it work well with iPhones?
Yes. Buyers specifically praise its compatibility with iOS, and it ranks as a top Apple Watch alternative according to AI rankings.
What's the main weakness reviewers see?
The press is split on the watch. Four of seven outlets recommend it, but two give mixed reviews and Wareable dissents, suggesting reviewers don't fully agree on its overall value.
How good is the battery life?
Buyers rate battery life at 4.5 out of 5, placing it among the watch's stronger traits alongside design and build quality.
Is it good for fitness tracking?
Buyers rate its fitness capabilities lower than its performance and iOS compatibility, and the small sample size of reviews limits confidence in how it stacks up for serious fitness use. It ranks #10 for best fitness smartwatches overall.
Who is this watch for?
It's positioned as an affordable option for those wanting an Apple Watch alternative. It works best for buyers who prioritize strong everyday performance and iOS pairing over advanced fitness features.
The recap
Where it stands today.
- PositionBest rank #20 across 3 intents tracked (slipped 5 this week).
- FootprintStrongest in Best Smartwatches for Fitness (#20). Weakest in Best Fitness Trackers (#28).
- TraitsMost often described as “amoled” (4 mentions).
- Closest rivalVertical (2–1 across 3 shared intents).
- MakerBy Xiaomi — see how it ranks across other intents on its brand profile.
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