Amazfit Bip S vs Amazfit Smartwatch 2 ECGSize, Specs & Wrist Fit Compared
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Amazfit
Bip S
Amazfit
Smartwatch 2 ECG
Which one fits you
On wrists narrower than about 44mm, the Amazfit Smartwatch 2 ECG is the safer pick — it stays proportionate down to roughly 37mm, where the Amazfit Bip S starts to hang over the edge. Above 44mm both sit cleanly, and the Amazfit Bip S gives you more presence.
The Amazfit Bip S and Amazfit Smartwatch 2 ECG share a near-identical 35.3mm case, so wrist presence comes down to thickness, lug-to-lug and weight.
The Amazfit Bip S is the slimmer of the two (11.4mm vs 13.7mm), so it slides under a cuff more easily.
On the wrist the Amazfit Bip S feels lighter (31g vs 49g, case only).
Among the 128 35mm watches we hold thickness for, the Amazfit Bip S is thicker than 80% — it will sit high even though the case width reads modest.
Among the 105 35mm watches we hold thickness for, the Amazfit Smartwatch 2 ECG is thicker than 96% — it will sit high even though the case width reads modest.
Specification Comparison
| Spec | AmazfitBip S | AmazfitSmartwatch 2 ECG |
|---|---|---|
| Case Width | 35.3mm | 35.4mm |
| Lug-to-Lug | 42mm | 35.4mm |
| Thickness | 11.4mm | 13.7mm |
| Weight | 31g | 49g |
| Shape | Rectangle | Circular |
| Water Resistance | 5 ATM | Waterproof |
| GPS | 22 hours | Yes |
| Display | 1.28 inches | 1.39 inches |
| Always-On Display | Yes | No |
| Charge time | 2.5 hours | 1.5 hours |
| Battery life | 40 days | 5 days |
| Battery power | 200 mAh | 420 mAh |
| Has wireless charging | No | No |
| Has a removable battery | No | No |
| Battery life with GPS on | 22 hours | — |
| Has a solar power battery | No | No |
| Has a rechargeable battery | Yes | Yes |
| Has a battery level indicator | Yes | Yes |
| Released | 2020 | 2019 |
Battery life compared
The two are closest in everyday use and furthest apart in Smartwatch mode, where one lasts 8.0× as long as the other (40 days against 5 days).
Amazfit Bip SAmazfit Smartwatch 2 ECG
Smartwatch
40 days5 daysGPS
22 hours—
Full Specification Comparison
113 specs| Spec | Amazfit Bip S | Amazfit Smartwatch 2 ECG |
|---|---|---|
| Design | ||
| width | 35.3 | 35.4 |
| height | 42 | 35.4 |
| volume | 16.9 cm³ | 17.17 cm³ |
| weight | 31 g | 49 g |
| thickness | 11.4 | 13.7 |
| ATM rating | 5 ATM | — |
| resolution | 176 x 176 px | 454 x 454 px |
| screen size | 1.28 inches | 1.39 inches |
| Display type | LCD | OLED/AMOLED |
| Has a display | Yes | Yes |
| pixel density | 194 ppi | 462 ppi |
| width of band | 20 mm | 14 mm |
| water resistance | Waterproof | Waterproof |
| Always-On Display | Yes | No |
| has a touch screen | Yes | Yes |
| Gorilla Glass version | Gorilla Glass 3 | Gorilla Glass 3 |
| waterproof depth rating | 50 m | 50 m |
| Watch band is replaceable | Yes | Yes |
| Has sapphire glass display | No | No |
| has branded damage-resistant glass | Yes | Yes |
| Ingress Protection (IP) rating | — | IP68 |
| Battery | ||
| charge time | 2.5 hours | 1.5 hours |
| battery life | 40 days | 5 days |
| battery power | 200 mAh | 420 mAh |
| has wireless charging | No | No |
| has a removable battery | No | No |
| battery life with GPS on | 22 hours | — |
| Has a solar power battery | No | No |
| has a rechargeable battery | Yes | Yes |
| Sensors | ||
| has GPS | Yes | Yes |
| has a compass | Yes | Yes |
| Has a barometer | No | No |
| has a gyroscope | No | No |
| 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 | No | No |
| Monitors blood oxygenation levels | No | No |
| Features | ||
| release date | 2020-01-08 | 2019-06-11 |
| Has a stopwatch | Yes | Yes |
| Has smart alarm | No | No |
| warranty period | 1 years | 1 years |
| Has call control | Yes | No |
| Has silent alarm | Yes | Yes |
| Has notifications | Yes | Yes |
| Has ECG technology | No | Yes |
| Locates your phone | Yes | No |
| has a front camera | No | No |
| has fall detection | Yes | No |
| has voice commands | No | Yes |
| Acquires GPS faster | No | No |
| Has vibrating alerts | Yes | Yes |
| number of microphones | 0 | 1 |
| Can be used to answer calls | No | No |
| has irregular heart rate warnings | No | Yes |
| Has a built-in camera remote control function | No | Yes |
| RAM | — | 0.5GB |
| CPU speed | — | 4 x 1.1 GHz |
| internal storage | — | 4GB |
| Connectivity | ||
| has NFC | No | No |
| supports ANT+ | No | No |
| supports Wi-Fi | No | Yes |
| supports Galileo | No | No |
| Bluetooth version | 5 | — |
| has a cellular module | No | No |
| Is compatible with iOS | No | Yes |
| Is compatible with Android | Yes | Yes |
| Miscellaneous | ||
| has aptX | No | No |
| Has passcode | Yes | Yes |
| Has auto pause | Yes | 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 | 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 |
| 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 | No | No |
| Predicts start date | Yes | Yes |
| Tracks water intake | No | No |
| Has inactivity alerts | Yes | No |
| Has period notifications | Yes | Yes |
| Has temperature tracking | No | No |
| Provides activity reports | Yes | Yes |
| Displays fertile window notifications | Yes | Yes |
| Counts how many calories you've burned | Yes | Yes |
| Activity tracking | ||
| Measures pace | Yes | Yes |
| Tracks distance | Yes | Yes |
| Tracks elevation | No | Yes |
| Designed for golf | No | No |
| Tracks your sleep | Yes | Yes |
| Tracks steps taken | Yes | Yes |
| Designed for diving | No | No |
| Has a route tracker | No | No |
| Has exercise tagging | Yes | Yes |
| Has multi-sport mode | Yes | Yes |
| Tracks calorie intake | No | No |
| Provides sleep reports | Yes | Yes |
| Detects activities automatically | No | Yes |
| Has a stroke counter for swimming | Yes | No |
Wrist Fit
Amazfit Bip S
Sits best on wrists ~44–60mm wide (≈ 11.7–16.0cm circumference).
Amazfit Smartwatch 2 ECG
Sits best on wrists ~37–51mm wide (≈ 9.9–13.6cm 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 Bip S bigger than the Amazfit Smartwatch 2 ECG?
The Amazfit Smartwatch 2 ECG is bigger — 35.4mm vs 35.3mm case width.
Which fits a smaller wrist better, the Amazfit Bip S or the Amazfit Smartwatch 2 ECG?
The Amazfit Bip S suits wrists around 44–60mm wide, and the Amazfit Smartwatch 2 ECG around 37–51mm. The one with the smaller lower bound is the safer pick for a small wrist.
Can I see the Amazfit Bip S and Amazfit Smartwatch 2 ECG 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.