Apple Watch Series 6 (40mm) vs Apple Watch Series 3 (38mm) 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 6 (40mm) | Apple Watch Series 3 (38mm) | 
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                                    Released
                     · 
                
                
                                                Sep 18, 2020
                                    
             
         | 
                                                                    
                                                                    
                                                    
                             
                                    Released
                     · 
                
                
                                                2017
                                    
             
         | 
                                    
| 
                                                                    
                                                    
                                                                                                                                                                        
                                    
                             
                
                
                                                1.6-inch · 394x324px
                                    
             
         | 
                                                                    
                                                                    
                                                    
                                                                                                                                                                        
                                    
                             
                
                
                                                1.5-inch · 340x272px
                                    
             
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                                                1GB · 32GB
                                    
             
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                                                768GB · 16GB
                                    
             
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                                                279 mAh
                                    
             
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Availability
| Officially announced | |
|---|---|
| Sep 15, 2020 | |
| Prices (MSRP) | |
| $499 | |
Design
| Dimensions | |
|---|---|
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 1.52 x 1.31 x 0.45 inches  38.6 x 33.3 x 11.4 mm  | 
        
                                    |
| Weight | |
| 1.50 oz / 42.4 g | |
| Wrist size | |
| Case fits 130-200 mm wrists | |
| Materials | |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 Back: Ceramic Frame: Stainless steel  | 
        
                                    |
| Materials & Colors | |
|                                                                                                             Aluminum: Silver, Space gray, Gold, Blue, Red  Stainless steel: Silver, Graphite, Gold Titanium: Titanium, Space black  | 
        
                                                        |
| Resistance | |
| Water (up to 50 meters) | Water, Dust | 
| Colors | |
| Space Black, Silver | |
Display
| Size | |
|---|---|
| 1.6-inch | 1.5-inch, 55.12% screen-to-body | 
| Type | |
| OLED, 1000 nits | OLED, 1000 nits | 
| Resolution | |
| 394x324px, 325 PPI | 340x272px, 290 PPI | 
| Protection | |
| Sapphire | Sapphire | 
| Features | |
| Pressure-sensitive, Scratch-resistant glass, Ambient light sensor | Pressure-sensitive, Scratch-resistant glass | 
Hardware
| System chip | |
|---|---|
| Apple S6 | Apple S3 | 
| Processor | |
| Dual-core | Dual-core | 
| GPU | |
| PowerVR | PowerVR | 
| Memory | |
| 1GB/32GB | 768GB/16GB | 
| Storage expansion | |
| not expandable | |
| OS | |
| watchOS (9.x, 8.x, 7.x, 6.x) | watchOS (8.x, 7.x, 6.1, 6.x, 5.1, 5, 4.x) | 
| Compatible devices | |
| Apple iPhone 6s or later with iOS 13 or later | |
Battery
| Type | |
|---|---|
| Li - Ion | 279 mAh | 
| Charging | |
| Magnetic charging | Qi wireless charging | 
Connectivity & Features
| Bluetooth | |
|---|---|
| 5.0 | 4.2 | 
| WLAN | |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 b,g,n 802.11 b, g, n  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 b,g,n 802.11 b, g, n  | 
| Sensors | |
| Accelerometer, Gyroscope, Altimeter, Compass, Heart rate, Barometer, ECG, Blood Oxygen, Ambient light sensor | Accelerometer, Gyroscope, Altimeter, Compass, Heart rate, Barometer | 
| Location | |
| GPS, Glonass | A-GPS, Glonass | 
| Other | |
| NFC | NFC | 
Multimedia
| Headphones | |
|---|---|
| No 3.5mm jack | |
| Speakers | |
| Loudspeaker | Loudspeaker | 
Cellular
| 4G (FDD) Bands | |
|---|---|
| 1, 2, 3, 4, 5, 7, 12, 13, 17, 18, 19, 25, 26, 66 | 1, 3, 5, 7, 8, 18, 19, 20, 26 | 
| 4G (TDD) Bands | |
| 39, 40, 41 | |
| 3G Bands | |
| 1, 2, 4, 5, 8 | 1, 5, 8 | 
| Data Speed | |
| LTE, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s | LTE, HSDPA+ (4G) 42.2 Mbit/s | 
| SIM type | |
| eSIM | eSIM | 
Alternative variants
non-LTE version
                                    | Materials & Colors | Aluminum: Silver, Space gray, Gold, Blue, Red | 
|---|---|
| Prices (MSRP) | $399 | 
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