| key specs | 
| Strap Colour | Carbon, Lunar White | White | 
| Compatible OS | Android, iOS | - | 
| Dial Shape | Square | Rectangle | 
| Display Type | AMOLED | OLED Retina | 
| Ideal For | Unisex | Unisex | 
| Display Size | - | 42mm | 
| Strap Material | - | Rubber | 
| general | 
| Brand | Fitbit | Apple | 
| Model | Sense | Watch Series 1 Smartwatch | 
| Release date | August 25, 2020 | - | 
| Model Name | Sense | Watch Series 1 | 
| Dial Shape | Square | Rectangle | 
| Size | Regular | Regular | 
| Touchscreen | Yes | Yes | 
| Water Resistant | Yes | Yes | 
| Water Resistance Depth | 50 meters | - | 
| Ideal For | Unisex | Unisex | 
| Strap Colour | Carbon, Lunar White | White | 
| Model Number | - | MNNL2HN/A | 
| Strap Material | - | Rubber | 
| Usage | - | Notifier | 
| Dial Material | - | Aluminum | 
| Dial Colour | - | Black | 
| product details | 
| Sensor | Multi-path optical heart rate sensor, Multipurpose electrical sensors compatible with EDA Scan app, Gyroscope, Altimeter, 3-axis accelerometer, Skin temperature sensor, Ambient light sensor | Heart Rate Sensor, Accelerometer, Gyrometer | 
| Compatible Device | Mac OS X 12.2 and up, iPhone 5S and later, iPad 5 gen. and later, Android 7.0 and later | Iphone 5, 5C, 5S, Se, 6, 6 Plus, 6S, 6S Plus, 7 Or 7 Plus And Ios 10 Or Later | 
| Battery Type | Lithium-polymer | - | 
| Battery Life | Around 6 days | 18 hours | 
| Charge Time | - | 90 min | 
| Rechargeable Battery | - | Yes | 
| Other Features | - | Splash Resistant2 (Apple Watch Series 1 Has A Water Resistance Rating Of Ipx7 Under Iec Standard 60529. Apple Watch Series 1 Is Splash And Water Resistant, But Submerging Apple Watch Series 1 Is Not Recommended) | 
| connectivity features | 
| Call Function | Yes | Yes | 
| Bluetooth | Yes | Yes | 
| Bluetooth Version | 5 | v4.0 | 
| Wi-Fi | Yes | Yes | 
| GPS | Yes | No | 
| Other Connectivity Features | NFC | Wi-Fi (802.11B/G/N) | 
| platform and storage features | 
| Compatible Operating System | Android, iOS | - | 
| Operating System | - | 3 | 
| Processor Name | - | S1P | 
| camera and display features | 
| Display Type | AMOLED | OLED Retina | 
| Display Resolution | - | 312 x 390 Pixels | 
| Display Size | - | 42mm | 
| Other Display Features | - | Oled Retina Display With Force Touch (450 Nits) | 
| fitness and watch functions | 
| Step Count | Yes | - | 
| Calorie Count | Yes | Yes | 
| Heart Rate Monitor | Yes | Yes | 
| Altimeter | Yes | - | 
| Calendar | Yes | Yes | 
| Alarm Clock | Yes | Yes | 
| Date & Time Display | Yes | Date & Time | 
| Language | English | - | 
| audio and video features | 
| Speaker | Yes | - | 
| Microphone | Yes | - |