vs
8.8Display6.5
9.7Battery life3.2
4.9Health tracking8.3
9.6Sports & outdoor6.1
4.1Smart features3.2
5.0Build & durability3.7
Dimensions
Size comparison
Cheetah 2 UltraD2 Air X15
| Cheetah 2 Ultra | D2 Air X15 | Difference | |
|---|---|---|---|
| Height | 47.4 mm | 45 mm | +2.4 mm |
| Width | 47.4 mm | 45 mm | +2.4 mm |
| Thickness | 13.3 mm | 12.5 mm | +0.8 mm |
| Weight | 52 g | 38 g | +14 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Cheetah 2 Ultra better than D2 Air X15?
- Battery life (smartwatch mode)30 days vs 10 days3×
- GPS battery life (dual-band)60 h vs 17 h3.5×
- Storage64 GB vs 8 GB8×
- Sapphire crystalYes · D2 Air X15: No
- Sport profiles180 vs 93+94%
- Screen size1.5″ vs 1.4″+7%
- Resolution (width)480 px vs 454 px+6%
Why is D2 Air X15 better than Cheetah 2 Ultra?
- Weight52 g vs 38 g+37%
- Thickness13.3 mm vs 12.5 mm+6%
Specifications
Side by side
| Design & durability | ||
| Case size | 47 mm | 45 mm |
| Weight | 52 g | 38 g |
| Thickness | 13.3 mm | 12.5 mm |
| Height | 47.4 mm | 45 mm |
| Width | 47.4 mm | 45 mm |
| Case material | Titanium | Stainless steel |
| Sapphire crystal | Yes | No |
| Lens / cover glass | Sapphire glass | Corning® Gorilla® Glass 3 |
| Strap material | — | silicone |
| Water resistance | 5 ATM | 5 ATM |
| Water rating (maker) | — | 5 ATM |
| Military-grade (MIL-STD-810) | Yes | — |
| Display | ||
| Screen size | 1.5″ | 1.4″ |
| Display technology | AMOLED | AMOLED |
| Panel | AMOLED | AMOLED |
| AMOLED / OLED display | Yes | Yes |
| Always-on display | — | Yes |
| Touchscreen | Yes | Yes |
| Resolution (width) | 480 px | 454 px |
| Resolution (height) | 480 px | 454 px |
| Pixel density | 323 ppi | 324 ppi |
| Peak brightness | 3,000 nits | — |
| Battery | ||
| Battery life (smartwatch mode) | 30 days | 10 days |
| Battery life with always-on display | — | 4 days |
| Battery saver mode | — | 25 days |
| GPS battery life | — | 20 h |
| GPS battery life (dual-band) | 60 h | 17 h |
| Battery capacity | 780 mAh | — |
| Battery type | — | 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 |
| 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 |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Dual-band GPS | Yes | Yes |
| Satellite systems | — | GLONASS, GALILEO, BDS, QZSS |
| Barometric altimeter | Yes | Yes |
| Compass | Yes | Yes |
| Multisport / triathlon mode | — | Yes |
| Sport profiles | 180 | 93 |
| LED flashlight | Yes | Yes |
| Connectivity | ||
| NFC payments | — | Yes |
| Wi-Fi | Wi-Fi 4 | Wi-Fi 4 |
| Bluetooth | 5.2 | — |
| ANT+ sensors | — | Yes |
| Smart features | ||
| Calls from the wrist | Yes | Yes |
| Speaker | Yes | Yes |
| Microphone | Yes | Yes |
| Voice assistant | Yes | Yes |
| Music on the watch | Yes | Yes |
| Storage | 64 GB | 8 GB |
| Third-party apps | — | Yes |
| Platform | ||
| Operating system | — | Garmin OS |
| Platform | Proprietary | Proprietary |
| Works with | Android, iOS | iOS, Android |
