vs
6.5Display7.0
8.3Health tracking4.9
6.1Sports & outdoor6.3
3.7Build & durability4.8
Dimensions
Size comparison
D2 Air X15Race 3S
| D2 Air X15 | Race 3S | Difference | |
|---|---|---|---|
| Height | 45 mm | 46 mm | −1 mm |
| Width | 45 mm | 46 mm | −1 mm |
| Thickness | 12.5 mm | 11.4 mm | +1.1 mm |
| Weight | 38 g | 56 g | −18 g |
Drawn to the same scale from the official dimensions (front and side).
Why is D2 Air X15 better than Race 3S?
- Weight38 g vs 56 g+47%
- Screen size1.4″ vs 1.32″+6%
Why is Race 3S better than D2 Air X15?
- Battery life (smartwatch mode)10 days vs 12 days+20%
- Storage8 GB vs 64 GB8×
- Sapphire crystalNo · D2 Air X15: Yes
- Thickness12.5 mm vs 11.4 mm+10%
- Pixel density324 ppi vs 353 ppi+9%
- Resolution (width)454 px vs 466 px+3%
Specifications
Side by side
| Design & durability | ||
| Case size | 45 mm | 46 mm |
| Weight | 38 g | 56 g |
| Thickness | 12.5 mm | 11.4 mm |
| Height | 45 mm | 46 mm |
| Width | 45 mm | 46 mm |
| Case material | Stainless steel | Titanium |
| Sapphire crystal | No | Yes |
| Lens / cover glass | Corning® Gorilla® Glass 3 | Sapphire crystal |
| Strap material | silicone | Silicone |
| Water resistance | 5 ATM | 5 ATM |
| Water rating (maker) | 5 ATM | 50 m |
| Display | ||
| Screen size | 1.4″ | 1.32″ |
| Display technology | AMOLED | AMOLED |
| Panel | AMOLED | AMOLED |
| AMOLED / OLED display | Yes | Yes |
| Always-on display | Yes | Yes |
| Touchscreen | Yes | Yes |
| Resolution (width) | 454 px | 466 px |
| Resolution (height) | 454 px | 466 px |
| Pixel density | 324 ppi | 353 ppi |
| Battery | ||
| Battery life (smartwatch mode) | 10 days | 12 days |
| Battery life with always-on display | 4 days | — |
| Battery saver mode | 25 days | — |
| GPS battery life | 20 h | — |
| GPS battery life (dual-band) | 17 h | — |
| Battery type | Lithium ion | rechargeable lithium-ion |
| Wireless charging | No | — |
| Charging | Garmin proprietary plug charger | — |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| ECG | Yes | — |
| Skin temperature | Yes | — |
| Temperature sensor | Yes | Yes |
| HRV tracking | Yes | Yes |
| Sleep tracking | Yes | Yes |
| Sensors | GPS, GLONASS, Galileo, QZSS, BeiDou, Elevate wrist heart rate monitor, Pulse Ox blood oxygen saturation monitor, Barometric altimeter, Compass, Gyroscope, Accelerometer, Thermometer, Ambient light sensor | Optical HR, Barometer, Compass, Thermometer |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Dual-band GPS | Yes | Yes |
| Satellite systems | GLONASS, GALILEO, BDS, QZSS | GPS, GLONASS, GALILEO, BDS, QZSS |
| Offline maps | — | Yes |
| Barometric altimeter | Yes | Yes |
| Compass | Yes | Yes |
| Multisport / triathlon mode | Yes | Yes |
| Sport profiles | 93 | — |
| Dive mode | — | Yes |
| LED flashlight | Yes | — |
| Connectivity | ||
| NFC payments | Yes | — |
| Wi-Fi | Wi-Fi 4 | — |
| ANT+ sensors | Yes | — |
| Smart features | ||
| Calls from the wrist | Yes | — |
| Speaker | Yes | — |
| Microphone | Yes | — |
| Voice assistant | Yes | — |
| Music on the watch | Yes | Yes |
| Storage | 8 GB | 64 GB |
| Third-party apps | Yes | — |
| Platform | ||
| Operating system | Garmin OS | Suunto OS |
| Platform | Proprietary | Proprietary |
| Works with | iOS, Android | iOS, Android |
