| Physical features | Samsung Galaxy Watch (46mm SM-R805U) | Apple Watch 3 Aluminum (38mm) |
| Model | Galaxy Watch (46mm SM-R805U) | Watch 3 Aluminum (38mm) |
| Other model names | Galaxy Watch 46mm (4G LTE) SM-R805UZSAXAR, Samsung Galileo | Apple Watch Series 3 A1858 GPS 8GB, Apple Watch S3, iWatch |
| Country or region available | 
USA | 
(Global, International) |
| Brand | Samsung | Apple |
| Release date | August, 2018 | September, 2017 |
| Depth | 13 millimeters (0.51 inches) | 11.4 millimeters (0.45 inches) |
| Size (width x height) | 46 x 49 millimeters (1.81 x 1.93 in) | 33.3 x 38.6 millimeters (1.31 x 1.52 in) |
| Weight | 63 grams (2.21 ounces) | 27 grams (.95 ounces) |
| Qwerty physical keyboard | Not supported | Not supported |
| Antenna | Internal antenna | Not supported |
| Build, materials | Stainless steel body, glass front | Aluminum body, glass front, plastic composite back |
| Protection against water and others | 50 meters waterproof.
MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant. | 50 meters waterproof |
| System (OS) | Samsung Galaxy Watch (46mm SM-R805U) | Apple Watch 3 Aluminum (38mm) |
| Operating system | Tizen 4.0 | WatchOS 4.0 |
| Firmware update | feature not registered | WatchOS 5.0 |
| Hardware | Samsung Galaxy Watch (46mm SM-R805U) | Apple Watch 3 Aluminum (38mm) |
| Chipset | 64bit - Samsung Exynos 9 Dual 9110 (10nm) | 32bit - Apple S3 (28nm) |
| CPU processor | 1.15Ghz Dual-Core ARM Cortex-A53 | 1Ghz Dual-Core ARM Cortex-A7 |
| GPU graphical controller | ARM Mali-T720 MP1 | PowerVR G6200 |
| RAM memory | 1.5GB LPDDR3 | 768MB LPDDR4 |
| Internal storage | 4GB (1.5GB available)
eMMC | 8GB (5GB available) |
| External storage | Not supported | Not supported |
| Display | Samsung Galaxy Watch (46mm SM-R805U) | Apple Watch 3 Aluminum (38mm) |
| Display type | Super AMOLED | AMOLED |
| Screen size | 1.3" inches | 1.5" inches |
| Screen-to-body ratio | ~24.2% (screen-to-body ratio) | ~55.1% (screen-to-body ratio) |
| Display resolution | 360x360 pixels (1:1) | 340x272 pixels |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 392 PPI | 290 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Gorilla Glass DX+ | Scratch-resistant glass |
| Display features | Not supported | feature not registered |
| Mobile networks | Samsung Galaxy Watch (46mm SM-R805U) | Apple Watch 3 Aluminum (38mm) |
| Dual-SIM | Not supported | Not supported |
| SIM card | 1 slot (Single-SIM)
e-SIM (Eletronic) | Not supported |
| Maximum download/upload | 10 Mbps | feature not registered |
| Network technology | 3G, 4G | 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 | UMTS 850/1700/1900 | Not supported |
| Primary 4G network | LTE (Bands 2,4,5,12,13,25,26,66) | Not supported |
| Primary 5G network | Not supported | Not supported |
| Primary data network | UMTS, HSDPA, HSUPA, HSPA+, LTE | 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 | Samsung Galaxy Watch (46mm SM-R805U) | Apple Watch 3 Aluminum (38mm) |
| Messaging | SMS (T9), MMS, E-mail, Push mail | SMS, E-mail |
| Speakerphone | Supported | Supported |
| Video calling | Not supported | Not supported |
| Call control | Voice dialing, Voice recorder, Voice commands | Not supported |
| Camera | Samsung Galaxy Watch (46mm SM-R805U) | Apple Watch 3 Aluminum (38mm) |
| 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 | Samsung Galaxy Watch (46mm SM-R805U) | Apple Watch 3 Aluminum (38mm) |
| 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 | Samsung Galaxy Watch (46mm SM-R805U) | Apple Watch 3 Aluminum (38mm) |
| Radio | Not supported | Not supported |
| TV | Not supported | Not supported |
| Video formats | MP4 | MP4, H.264, H.263 |
| Audio formats | MP3, WAV, WMA, OGG, eAAC+ | MP3, WAV, eAAC+, FLAC |
| Connectivity | Samsung Galaxy Watch (46mm SM-R805U) | Apple Watch 3 Aluminum (38mm) |
| USB | Not supported | Not supported |
| TV output | Not supported | Not supported |
| Audio output | Not supported | Not supported |
| Bluetooth | 4.2 + A2DP | 4.2 + 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 | Samsung Galaxy Watch (46mm SM-R805U) | Apple Watch 3 Aluminum (38mm) |
| Active noise cancellation | Not supported | Not supported |
| Vibrating alert | Supported | Supported |
| Ringtones | Polyphonic and customized | feature not registered |
| Web browser | Not supported | Not supported |
| Sensors | Accelerometer
Ambient Light sensor
Gyroscope
Barometer
Heart rate
Pedometer
| Accelerometer
Ambient Light sensor
Gyroscope
Barometer
Heart rate
Pedometer
|
| Other features | - Colors: Silver
- Straps: Onyx Black, Deep Ocean Blue, Basalt Grey
- Compatible with standard 22mm straps
- Always-on display
- Rotating bezel
- Samsung Pay
- Compatible with Sprint, T-Mobile and Verizon carriers | - Colors: Silver, Gold, Space Gray
- Sport Band or Nike Sport Band
- 1000 nits screen
- 3D Touch display
- Siri |
| Power supply | Samsung Galaxy Watch (46mm SM-R805U) | Apple Watch 3 Aluminum (38mm) |
| Battery | Li-Ion: Lithium-Ion (Non removable) | Li-Ion: Lithium-Ion (Non removable) |
| Battery capacity | 472 mAh | 279 mAh |
| Charger, watts | 3.5W (5V/0.7A) Standard charging
Qi wireless charging | Standard charging
Magnetic charging (dock) |
| Talk time autonomy | feature not registered | 1080 minutes | 18 hours | 0.8 day |
| Standby | 4320 minutes | 72 hours | 3 days | feature not registered |
| Radiation rate | Samsung Galaxy Watch (46mm SM-R805U) | Apple Watch 3 Aluminum (38mm) |
| SAR 1.6W/kg (USA, Mexico, etc.) | 1.244W/kg (head) | 1.733W/kg (body) | 0.17W/kg (head) | 0.03W/kg (body) |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | feature not registered |