| key specs |
| Strap Colour | Blue, Black, Pink Clay, Olive, Thistle | - |
| Compatible OS | Android, iOS | - |
| Dial Shape | Square | Round |
| Display Type | AMOLED | - |
| Ideal For | Unisex | - |
| Strap Material | - | Silicone |
| general |
| Brand | Fitbit | Huami |
| Model | Versa 3 | Amazfit Stratos 3 |
| Release date | August 25, 2020 | August 27, 2019 |
| Model Name | Versa 3 | Stratos 3 |
| Dial Shape | Square | Round |
| Size | Regular | - |
| Touchscreen | Yes | Yes |
| Water Resistant | Yes | 5ATM |
| Water Resistance Depth | 50 meters | 50 Meters |
| Ideal For | Unisex | - |
| Strap Colour | Blue, Black, Pink Clay, Olive, Thistle | - |
| Strap Material | - | Silicone |
| Usage | - | For Sports |
| Dial Material | - | Stainless Steel |
| product details |
| Sensor | Accelerometer, Ambient light sensor, Gyroscope Built-in GPS + GLONASS, Altimeter, Optical heart rate sensor | BioTracker PPG Bio-Tracking optical sensor, 6-axis acceleration sensor, 3-axis geomagnetic sensor, Air pressure sensor |
| Compatible Device | Mac OS X 12.2 and up, iPhone 5S and later, iPad 5 gen. and later, Android 7.0 and later | Android 5.0 or iOS 10.0 and above |
| Battery Type | Lithium-polymer | Lithium-ion polymer battery |
| Battery Life | Around 6 days | 7 days in smart mode |
| Notification | - | Yes |
| Notification Type | - | Calls, Messages, App Alerts |
| Charge Time | - | 2.5 hours |
| connectivity features |
| Call Function | Yes | - |
| Bluetooth | Yes | Yes |
| Wi-Fi | Yes | Yes |
| GPS | Yes | Yes |
| Other Connectivity Features | NFC | - |
| Bluetooth Version | - | 5.0 |
| platform and storage features |
| Compatible Operating System | Android, iOS | - |
| Operating System | - | Amazfit OS |
| Number of Cores | - | dual-core |
| RAM | - | 512MB |
| Processor Speed | - | 1200 |
| Internal Memory | - | 2GB |
| camera and display features |
| Display Type | AMOLED | - |
| Display Resolution | - | 320x320 |
| fitness and watch functions |
| Step Count | Yes | Yes |
| Calorie Count | Yes | Yes |
| Heart Rate Monitor | Yes | Yes |
| Altimeter | Yes | - |
| Calendar | Yes | - |
| Alarm Clock | Yes | Yes |
| Date & Time Display | Yes | - |
| Language | English | - |
| Number of Buttons | - | 4 |
| Other Fitness Features | - | 80 Sports Modes |
| audio and video features |
| Speaker | Yes | - |
| Microphone | Yes | - |
| Audio Features | - | Standalone Music Playback |
| dimensions |
| Thickness | - | 13.4 mm |
| Diameter | - | 48.6mm |
| Weight (g) | - | 40.40 |