| Physical features | Apple Watch 3 Aluminum (38mm) | Apple Watch 2 (Nike+ 42mm) |
| Model | Watch 3 Aluminum (38mm) | Watch 2 (Nike+ 42mm) |
| Other model names | Apple Watch Series 3 A1858 GPS 8GB, Apple Watch S3, iWatch | Apple Watch Nike+ Series 2 A1758 42mm, iWatch Nike Plus |
| Country or region available | 
(Global, International) |
(Global, International) |
| Brand | Apple | Apple |
| Release date | September, 2017 | December, 2016 |
| Depth | 11.4 millimeters (0.45 inches) | 11.4 millimeters (0.45 inches) |
| Size (width x height) | 33.3 x 38.6 millimeters (1.31 x 1.52 in) | 36.4 x 42.5 millimeters (1.43 x 1.67 in) |
| Weight | 27 grams (.95 ounces) | 34 grams (1.19 ounces) |
| Qwerty physical keyboard | Not supported | Not supported |
| Antenna | Not supported | Not supported |
| Build, materials | Aluminum body, glass front, plastic composite back | Aluminum body, glass front, ceramic back |
| Protection against water and others | 50 meters waterproof | 50 meters waterproof |
| System (OS) | Apple Watch 3 Aluminum (38mm) | Apple Watch 2 (Nike+ 42mm) |
| Operating system | WatchOS 4.0 | WatchOS 3.0 |
| Firmware update | WatchOS 5.0 | WatchOS 5.0 |
| Hardware | Apple Watch 3 Aluminum (38mm) | Apple Watch 2 (Nike+ 42mm) |
| Chipset | 32bit - Apple S3 (28nm) | 32bit - Apple S2 (28nm) |
| CPU processor | 1Ghz Dual-Core ARM Cortex-A7 | 780Mhz Dual-Core ARM Cortex-A7 |
| GPU graphical controller | PowerVR G6200 | PowerVR G6200 |
| RAM memory | 768MB LPDDR4 | 512MB LPDDR3 |
| Internal storage | 8GB (5GB available) | 8GB (5GB available) |
| External storage | Not supported | Not supported |
| Display | Apple Watch 3 Aluminum (38mm) | Apple Watch 2 (Nike+ 42mm) |
| Display type | AMOLED | AMOLED |
| Screen size | 1.5" inches | 1.65" inches |
| Screen-to-body ratio | ~55.1% (screen-to-body ratio) | ~55.4% (screen-to-body ratio) |
| Display resolution | 340x272 pixels | 390x312 pixels |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 290 PPI | 303 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Scratch-resistant glass | Scratch-resistant glass |
| Display features | feature not registered | feature not registered |
| Mobile networks | Apple Watch 3 Aluminum (38mm) | Apple Watch 2 (Nike+ 42mm) |
| Dual-SIM | Not supported | Not supported |
| SIM card | Not supported | Not supported |
| Maximum download/upload | feature not registered | feature not registered |
| Network technology | feature not registered | feature not registered |
| Frequency, bands | Expand band detailsCollapse details |
| GSM Mhz band | Not supported | Not supported |
| Primary 2G network | Not supported | Not supported |
| Primary 3G network | Not supported | Not supported |
| Primary 4G network | Not supported | Not supported |
| Primary 5G network | Not supported | Not supported |
| Primary data network | Not supported | Not supported |
| Secondary 2G network | Not supported | Not supported |
| Secondary 3G network | Not supported | Not supported |
| Secondary 4G network | Not supported | Not supported |
| Secondary data network | Not supported | Not supported |
| Calling | Apple Watch 3 Aluminum (38mm) | Apple Watch 2 (Nike+ 42mm) |
| Messaging | SMS, E-mail | SMS, E-mail |
| Speakerphone | Supported | Supported |
| Video calling | Not supported | Not supported |
| Call control | Not supported | Not supported |
| Camera | Apple Watch 3 Aluminum (38mm) | Apple Watch 2 (Nike+ 42mm) |
| Back camera (main camera) | Not supported | Not supported |
| Main camera resolution | Not supported | Not supported |
| Video recording (primary) | Not supported | Not supported |
| Flash | Not supported | Not supported |
| Focal aperture | feature not registered | feature not registered |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | feature not registered |
| Pixel size | feature not registered | feature not registered |
| Autofocus | Not supported | Not supported |
| Touch focus | Not supported | Not supported |
| Image stabilization | Not supported | Not supported |
| Zoom | Not supported | Not supported |
| Face/smile detection | Not supported | Not supported |
| BSI sensor | Not supported | Not supported |
| HDR | Not supported | Not supported |
| 2ª camera | Apple Watch 3 Aluminum (38mm) | Apple Watch 2 (Nike+ 42mm) |
| Front camera (secondary) | Not supported | Not supported |
| Front camera resolution | Not supported | Not supported |
| Video recording (secondary) | Not supported | Not supported |
| Front flash | Not supported | Not supported |
| Focal aperture | feature not registered | feature not registered |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | feature not registered |
| Pixel size | feature not registered | feature not registered |
| Multimedia | Apple Watch 3 Aluminum (38mm) | Apple Watch 2 (Nike+ 42mm) |
| Radio | Not supported | Not supported |
| TV | Not supported | Not supported |
| Video formats | MP4, H.264, H.263 | MP4, H.264, H.263 |
| Audio formats | MP3, WAV, eAAC+, FLAC | MP3, WAV, eAAC+, FLAC |
| Connectivity | Apple Watch 3 Aluminum (38mm) | Apple Watch 2 (Nike+ 42mm) |
| USB | Not supported | Not supported |
| TV output | Not supported | Not supported |
| Audio output | Not supported | Not supported |
| Bluetooth | 4.2 + A2DP | 4.0 + A2DP |
| WiFi | 802.11 b/g/n (2.4Ghz) | 802.11 b/g/n (2.4Ghz) |
| DLNA | Not supported | Not supported |
| NFC | Supported | Supported |
| GPS | A-GPS, GeoTagging, GLONASS | A-GPS, GeoTagging, GLONASS |
| Infrared port | Not supported | Not supported |
| Other functions | Apple Watch 3 Aluminum (38mm) | Apple Watch 2 (Nike+ 42mm) |
| Active noise cancellation | Not supported | Not supported |
| Vibrating alert | Supported | Supported |
| Ringtones | feature not registered | feature not registered |
| Web browser | Not supported | Not supported |
| Sensors | Accelerometer
Ambient Light sensor
Gyroscope
Barometer
Heart rate
Pedometer
| Accelerometer
Ambient Light sensor
Gyroscope
Heart rate
Pedometer
|
| Other features | - Colors: Silver, Gold, Space Gray
- Sport Band or Nike Sport Band
- 1000 nits screen
- 3D Touch display
- Siri | - Colors: Space gray, Silver
- Sport or woven nylon bands
- 1000 nits screen
- 3D Touch display
- Siri
- Requires an iPhone 5s/iOS 11 or later |
| Power supply | Apple Watch 3 Aluminum (38mm) | Apple Watch 2 (Nike+ 42mm) |
| Battery | Li-Ion: Lithium-Ion (Non removable) | Li-Ion: Lithium-Ion (Non removable) |
| Battery capacity | 279 mAh | 334 mAh |
| Charger, watts | Standard charging
Magnetic charging (dock) | Standard charging
Magnetic charging (dock) |
| Talk time autonomy | 1080 minutes | 18 hours | 0.8 day | 1080 minutes | 18 hours | 0.8 day |
| Standby | feature not registered | feature not registered |
| Radiation rate | Apple Watch 3 Aluminum (38mm) | Apple Watch 2 (Nike+ 42mm) |
| SAR 1.6W/kg (USA, Mexico, etc.) | 0.17W/kg (head) | 0.03W/kg (body) | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | feature not registered |