Amazfit Active Edge vs Xiaomi Watch S4 Sport
Size, specs & wrist fit compared
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Which one fits you
Both need much the same wrist — roughly 49–67mm across the flat of the wrist. Neither will fit where the other won't, so decide on thickness, weight and features instead.
The Amazfit Active Edge and Xiaomi Watch S4 Sport share a near-identical 46.6mm case, so wrist presence comes down to thickness, lug-to-lug and weight.
The Amazfit Active Edge is the slimmer of the two (12mm vs 12.6mm), so it slides under a cuff more easily.
On the wrist the Amazfit Active Edge feels lighter (34g vs 49g, case only).
Among the 110 47mm watches we hold thickness for, the Amazfit Active Edge is thinner than 65%, so it wears flatter than its width suggests.
The Xiaomi Watch S4 Sport is middle-of-the-pack for thickness among the 97 47mm watches in the database.
The Xiaomi Watch S4 Sport is 0.3mm wider, 0.3mm longer, 0.6mm thicker and 15g heavier than the Amazfit Active Edge. Both are circular.
Amazfit
Active Edge
Xiaomi
Watch S4 Sport
Switch or add watches
Amazfit
Active Edge
Xiaomi
Watch S4 Sport
2D Dimension Schematics
Every case drawn to scale on a shared centre — from above, and in profile against the wrist.
- Amazfit Active Edge46.6mm · 12mm thick
- Xiaomi Watch S4 Sport46.9mm · 12.6mm thick
3D preview
Amazfit Active Edge vs Xiaomi Watch S4 Sport on a wrist
Sized to your own wrist, turned any way you like.
Shapes are built from published measurements, not manufacturer 3D models — accurate proportions, generic dial.
Battery life compared
Runtime for every power mode either watch publishes, 1 of them directly comparable.
Amazfit Active EdgeXiaomi Watch S4 Sport
Battery Saver
576 hours—Smartwatch
16 days15 daysTraining
240 hours—GPS
20 hours—
Specifications
The short version
10 key specs| Spec | AmazfitActive Edge | XiaomiWatch S4 Sport |
|---|---|---|
| Case Width | 46.6mm | 46.9mm |
| Thickness | 12mm | 12.6mm |
| Weight | 34g | 49g |
| Shape | Circular | Circular |
| Water Resistance | 10 ATM | 5 ATM |
| GPS | Yes | Yes |
| Display type | LCD | OLED/AMOLED |
| Screen size | 1.32 inches | 1.43 inches |
| Battery life | 16 days | 15 days |
| Released | 2023 | 2024 |
Every specification
120 specs| Spec | Amazfit Active Edge | Xiaomi Watch S4 Sport |
|---|---|---|
| Design | ||
| width | 46.6 | 46.9 |
| height | 46.6 | 46.9 |
| volume | 26.06 cm³ | 27.72 cm³ |
| weight | 34 g | 49 g |
| thickness | 12 | 12.6 |
| ATM rating | 10 ATM | 5 ATM |
| resolution | 360 x 360 px | 466 x 466 px |
| screen size | 1.32 inches | 1.43 inches |
| Display type | LCD | OLED/AMOLED |
| Has a display | Yes | Yes |
| pixel density | 277 ppi | 326 ppi |
| width of band | 22 mm | 22 mm |
| water resistance | Waterproof | Waterproof |
| Always-On Display | No | Yes |
| has a touch screen | Yes | Yes |
| is designed for kids | No | No |
| waterproof depth rating | 100 m | 40 m |
| Watch band is replaceable | Yes | Yes |
| Has sapphire glass display | No | Yes |
| maximum operating temperature | 45 °C | — |
| Ingress Protection (IP) rating | IP68 | — |
| has branded damage-resistant glass | No | No |
| lowest potential operating temperature | 0 °C | — |
| Battery | ||
| charge time | 2 hours | — |
| battery life | 16 days | 15 days |
| battery power | 370 mAh | 586 mAh |
| has wireless charging | No | Yes |
| has a removable battery | No | No |
| battery life with GPS on | 20 hours | — |
| Has a solar power battery | No | No |
| has a rechargeable battery | Yes | Yes |
| battery life in training mode | 240 hours | — |
| battery life in power save mode | 576 hours | — |
| Sensors | ||
| has GPS | Yes | Yes |
| has a compass | No | Yes |
| Has a barometer | No | Yes |
| has a gyroscope | No | Yes |
| has an accelerometer | Yes | Yes |
| Monitors perspiration | No | No |
| Has a heart rate monitor | Yes | Yes |
| Has a temperature sensor | No | Yes |
| Monitors blood oxygenation levels | Yes | Yes |
| Has a cadence sensor | — | No |
| Features | ||
| release date | 2023-10-27 | 2024-07-19 |
| Has a stopwatch | Yes | Yes |
| Has smart alarm | No | No |
| warranty period | 1 years | 1 years |
| Has call control | Yes | Yes |
| Has silent alarm | Yes | Yes |
| measures VO2 max | Yes | Yes |
| Has notifications | Yes | Yes |
| Has ECG technology | No | No |
| Locates your phone | Yes | Yes |
| has fall detection | No | No |
| has voice commands | No | Yes |
| Acquires GPS faster | Yes | Yes |
| Has vibrating alerts | Yes | Yes |
| Can be used to answer calls | No | Yes |
| measures resting heart rate | Yes | Yes |
| has irregular heart rate warnings | No | No |
| Has a built-in camera remote control function | Yes | Yes |
| has HRV tracking | — | Yes |
| internal storage | — | 32GB |
| has a front camera | — | No |
| number of microphones | — | 1 |
| shows readiness level | — | Yes |
| has fast/slow heart rate notifications | — | Yes |
| Connectivity | ||
| has NFC | No | Yes |
| supports ANT+ | No | No |
| supports Wi-Fi | No | No |
| supports Galileo | Yes | Yes |
| Bluetooth version | 5 | 5.2 |
| has a cellular module | No | Yes |
| Is compatible with iOS | Yes | Yes |
| Is compatible with Android | Yes | Yes |
| SIM cards | — | 1 eSIM |
| Miscellaneous | ||
| Has passcode | Yes | Yes |
| Has auto pause | Yes | — |
| Is compatible with Windows | No | No |
| Is compatible with Mac OS X | No | No |
| has an external memory slot | No | No |
| Compatible with smart scales | Yes | — |
| has a battery level indicator | Yes | Yes |
| has a socket for a 3.5 mm audio jack | No | No |
| Compatible with external heart rate monitors | Yes | — |
| App & Software | ||
| Ad-free | Yes | Yes |
| Free app | Yes | Yes |
| Tracks BMI | Yes | — |
| Has coaching | Yes | No |
| Includes maps | Yes | Yes |
| Supports routes | Yes | No |
| Has achievements | Yes | Yes |
| Has goal setting | Yes | Yes |
| Has live tracking | Yes | — |
| Has exercise diary | Yes | Yes |
| Predicts ovulation | Yes | Yes |
| Can be personalised | Yes | Yes |
| Has weight tracking | Yes | Yes |
| Predicts start date | Yes | Yes |
| Tracks water intake | Yes | Yes |
| Has inactivity alerts | Yes | Yes |
| Has period notifications | Yes | Yes |
| Has temperature tracking | No | Yes |
| Provides activity reports | Yes | Yes |
| Displays fertile window notifications | Yes | — |
| Counts how many calories you've burned | Yes | Yes |
| Doesn’t require account | — | No |
| Activity tracking | ||
| Measures pace | Yes | Yes |
| Tracks distance | Yes | Yes |
| Tracks elevation | Yes | Yes |
| Designed for golf | No | — |
| Tracks your sleep | Yes | Yes |
| Tracks steps taken | Yes | Yes |
| Designed for diving | No | Yes |
| Has a route tracker | Yes | Yes |
| Has exercise tagging | Yes | Yes |
| Tracks calorie intake | Yes | Yes |
| Provides sleep reports | Yes | Yes |
| Detects activities automatically | Yes | Yes |
| Has a stroke counter for swimming | Yes | Yes |
Wrist Fit
Amazfit Active Edge
Sits best on wrists ~49–67mm wide (≈ 13.1–17.9cm circumference).
Xiaomi Watch S4 Sport
Sits best on wrists ~49–67mm wide (≈ 13.1–17.9cm circumference).
Frequently Asked Questions
Is the Amazfit Active Edge bigger than the Xiaomi Watch S4 Sport?
The Xiaomi Watch S4 Sport is bigger — 46.9mm vs 46.6mm case width.
Which fits a smaller wrist better, the Amazfit Active Edge or the Xiaomi Watch S4 Sport?
The Amazfit Active Edge suits wrists around 49–67mm wide, and the Xiaomi Watch S4 Sport around 49–67mm. The one with the smaller lower bound is the safer pick for a small wrist.
Can I see the Amazfit Active Edge and Xiaomi Watch S4 Sport side by side at true scale?
Yes — the schematics and photos above show both watches at matched scale, and our fit tool overlays each on your wrist width.