Apple Watch Series 3 (42mm) vs Apple Watch Ultra 3 Specs Comparison
Compare mobile phone specifications of up to three devices at once. Our specs comparison tool helps you find and compare the perfect phone for your needs.
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| Apple Watch Series 3 (42mm) | Apple Watch Ultra 3 |
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Released
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2017
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Released
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Sep 19, 2025
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1.6-inch · 390x312px
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1.9-inch · 502x410px
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768GB · 16GB
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1GB · 64GB
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341 mAh
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| Check prices |
Availability
| Officially announced | |
|---|---|
| Sep 09, 2025 | |
| Prices (MSRP) | |
| $799 | |
Design
| Dimensions | |
|---|---|
| 1.67 x 1.43 x 0.45 inches 42.5 x 36.4 x 11.4 mm |
1.93 x 1.73 x 0.47 inches 49 x 44 x 12 mm |
| Weight | |
| 1.86 oz / 52.8 g | 2.17 oz / 61.6 g |
| Materials | |
| Back: Ceramic Frame: Stainless steel |
Back: Ceramic Frame: Titanium |
| Resistance | |
| Water, Dust | Water, Dust; IP6X; MIL-STD-810 certified |
| Colors | |
| Space Black, Silver | Natural, Black |
Display
| Size | |
|---|---|
| 1.6-inch, 55.61% screen-to-body | 1.9-inch |
| Type | |
| OLED, 1000 nits | OLED, 3000 nits |
| Resolution | |
| 390x312px, 303 PPI | 502x410px, 338 PPI |
| Protection | |
| Sapphire | Sapphire |
| Features | |
| Pressure-sensitive, Scratch-resistant glass | |
Hardware
| System chip | |
|---|---|
| Apple S3 | Apple S10 |
| Processor | |
| Dual-core | Dual-core |
| GPU | |
| PowerVR | PowerVR |
| Memory | |
| 768GB/16GB | 1GB/64GB |
| Storage expansion | |
| not expandable | |
| OS | |
| watchOS (8.x, 7.x, 6.1, 6.x, 5.1, 5, 4.x) | watchOS (10.x) |
Battery
| Type | |
|---|---|
| 341 mAh | Li - Ion |
| Charging | |
| Qi wireless charging | Qi wireless charging |
Connectivity & Features
| Bluetooth | |
|---|---|
| 4.2 | 5.3 |
| WLAN | |
| b,g,n 802.11 b, g, n | a,b,g,n,ac 802.11 b, g, n |
| Sensors | |
| Accelerometer, Gyroscope, Altimeter, Compass, Heart rate, Barometer | Accelerometer, Gyroscope, Altimeter, Compass, Heart rate, Thermometer, Barometer, ECG, Blood Oxygen |
| Location | |
| A-GPS, Glonass | A-GPS, Glonass, Galileo, BeiDou, QZSS |
| Other | |
| NFC | NFC, Ultra Wideband (UWB) |
Multimedia
| Headphones | |
|---|---|
| No 3.5mm jack | |
| Speakers | |
| Loudspeaker | Multiple speakers |
Cellular
| 4G (FDD) Bands | |
|---|---|
| 1, 3, 5, 7, 8, 18, 19, 20, 26 | 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 25, 26, 66 |
| 4G (TDD) Bands | |
| 39, 40, 41 | |
| 3G Bands | |
| 1, 5, 8 | 1, 2, 4, 5 |
| Data Speed | |
| LTE, HSDPA+ (4G) 42.2 Mbit/s | LTE-A, HSDPA+ (4G) 42.2 Mbit/s |
| SIM type | |
| eSIM | eSIM |
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