Amazfit Active vs Garmin Venu 4 - 45mmSize, Specs & Wrist Fit Compared
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Amazfit
Active
Garmin
Venu 4 - 45mm
Which one fits you
On wrists narrower than about 47mm, the Amazfit Active is the safer pick — it stays proportionate down to roughly 38mm, where the Garmin Venu 4 - 45mm starts to hang over the edge. Above 47mm both sit cleanly, and the Garmin Venu 4 - 45mm gives you more presence.
The Garmin Venu 4 - 45mm wears larger than the Amazfit Active (45mm vs 42.36mm case), giving it more wrist presence — and needing a wider wrist to sit cleanly.
The Amazfit Active is the slimmer of the two (10.75mm vs 12mm), so it slides under a cuff more easily.
On the wrist the Amazfit Active feels lighter (27g vs 38g, case only).
Among the 723 42mm watches we hold thickness for, the Amazfit Active is thinner than 87%, so it wears flatter than its width suggests.
Among the 386 45mm watches we hold thickness for, the Garmin Venu 4 - 45mm is thinner than 76%, so it wears flatter than its width suggests.
Specification Comparison
| Spec | AmazfitActive | GarminVenu 4 - 45mm |
|---|---|---|
| Case Width | 42.36mm | 45mm |
| Lug-to-Lug | 35.9mm | 45mm |
| Thickness | 10.75mm | 12mm |
| Weight | 27g | 38g |
| Shape | Rectangle | Circular |
| Water Resistance | 5 ATM | 5 ATM |
| GPS | 16 hours | 19 hours |
| Display | 1.75 inches | 1.4 inches |
| Always-On Display | Yes | Yes |
| Charge time | 2 hours | 1 hours |
| Battery life | 14 days | 12 days |
| Battery power | 300 mAh | — |
| Has wireless charging | No | No |
| Has a removable battery | No | No |
| Battery life with GPS on | 16 hours | 19 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 | 720 hours | 25 hours |
| Has a battery level indicator | Yes | Yes |
| Released | 2023 | 2025 |
Battery life compared
The two are closest in everyday use and furthest apart in Battery Saver mode, where one lasts 28.8× as long as the other (30 days against 25 hours).
Amazfit ActiveGarmin Venu 4 - 45mm
Battery Saver
720 hours25 hoursSmartwatch
14 days12 daysTraining
240 hours—GPS
16 hours19 hours
Full Specification Comparison
123 specs| Spec | Amazfit Active | Garmin Venu 4 - 45mm |
|---|---|---|
| Design | ||
| width | 42.36 | 45 |
| height | 35.9 | 45 |
| volume | 16.35 cm³ | 24.3 cm³ |
| weight | 27 g | 38 g |
| thickness | 10.75 | 12 |
| ATM rating | 5 ATM | 5 ATM |
| resolution | 390 x 450 px | 454 x 454 px |
| screen size | 1.75 inches | 1.4 inches |
| Display type | OLED/AMOLED | OLED/AMOLED |
| Has a display | Yes | Yes |
| pixel density | 341 ppi | 458 ppi |
| width of band | 20 mm | 22 mm |
| water resistance | Water resistant | Waterproof |
| Always-On Display | Yes | Yes |
| has a touch screen | Yes | Yes |
| is designed for kids | No | No |
| Watch band is replaceable | Yes | Yes |
| Has sapphire glass display | No | No |
| has branded damage-resistant glass | No | Yes |
| Gorilla Glass version | — | Gorilla Glass 3 |
| waterproof depth rating | — | 50 m |
| maximum operating temperature | — | 55 °C |
| lowest potential operating temperature | — | -20 °C |
| Battery | ||
| charge time | 2 hours | 1 hours |
| battery life | 14 days | 12 days |
| battery power | 300 mAh | — |
| has wireless charging | No | No |
| has a removable battery | No | No |
| battery life with GPS on | 16 hours | 19 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 | 720 hours | 25 hours |
| Sensors | ||
| has GPS | Yes | Yes |
| has a compass | Yes | Yes |
| Has a barometer | No | Yes |
| has a gyroscope | No | Yes |
| Has a cadence sensor | No | No |
| has an accelerometer | Yes | Yes |
| Monitors perspiration | No | No |
| Has a heart rate monitor | Yes | Yes |
| Has a temperature sensor | Yes | Yes |
| Monitors blood oxygenation levels | Yes | Yes |
| Features | ||
| release date | 2023-10-27 | 2025-09-17 |
| 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 |
| has HRV tracking | Yes | Yes |
| internal storage | 0.25GB | 8GB |
| Has notifications | Yes | Yes |
| Has ECG technology | No | Yes |
| Locates your phone | Yes | Yes |
| has fall detection | No | Yes |
| has voice commands | No | Yes |
| Acquires GPS faster | Yes | Yes |
| Has vibrating alerts | Yes | Yes |
| number of microphones | 1 | — |
| shows readiness level | Yes | Yes |
| Can be used to answer calls | Yes | Yes |
| measures resting heart rate | Yes | Yes |
| has irregular heart rate warnings | No | Yes |
| has fast/slow heart rate notifications | Yes | Yes |
| Has a built-in camera remote control function | No | No |
| measures VO2 max | — | Yes |
| has a front camera | — | No |
| Connectivity | ||
| has NFC | No | Yes |
| supports ANT+ | No | Yes |
| supports Wi-Fi | No | Yes |
| supports Galileo | No | Yes |
| Bluetooth version | 5.2 | — |
| has a cellular module | No | No |
| Is compatible with iOS | Yes | Yes |
| Is compatible with Android | Yes | Yes |
| Miscellaneous | ||
| Has passcode | Yes | — |
| Has auto pause | Yes | Yes |
| Is compatible with Windows | No | Yes |
| Is compatible with Mac OS X | No | Yes |
| has an external memory slot | No | No |
| Compatible with smart scales | Yes | 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 | Yes |
| has aptX | — | No |
| Available on PC | — | Yes |
| Provides the sunrise/sunset time | — | Yes |
| App & Software | ||
| Ad-free | Yes | Yes |
| Free app | Yes | Yes |
| Tracks BMI | Yes | Yes |
| Has coaching | Yes | Yes |
| Includes maps | Yes | Yes |
| Supports routes | Yes | Yes |
| Has achievements | Yes | Yes |
| Has goal setting | Yes | Yes |
| Has live tracking | Yes | 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 | Yes | Yes |
| Provides activity reports | Yes | Yes |
| Displays fertile window notifications | Yes | 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 | Yes |
| Tracks your sleep | Yes | Yes |
| Tracks steps taken | Yes | Yes |
| Designed for diving | No | No |
| 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 |
| Has multi-sport mode | — | Yes |
Wrist Fit
Amazfit Active
Sits best on wrists ~38–51mm wide (≈ 10.1–13.6cm circumference).
Garmin Venu 4 - 45mm
Sits best on wrists ~47–64mm wide (≈ 12.6–17.1cm circumference).
2D Dimension Schematics
Accurate scale drawings based on case dimensions. Drag to pan, Ctrl+scroll to zoom. Works for every watch regardless of photo availability.
Frequently Asked Questions
Is the Amazfit Active bigger than the Garmin Venu 4 - 45mm?
The Garmin Venu 4 - 45mm is bigger — 45mm vs 42.36mm case width.
Which fits a smaller wrist better, the Amazfit Active or the Garmin Venu 4 - 45mm?
The Amazfit Active suits wrists around 38–51mm wide, and the Garmin Venu 4 - 45mm around 47–64mm. The one with the smaller lower bound is the safer pick for a small wrist.
Can I see the Amazfit Active and Garmin Venu 4 - 45mm 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.