vs
9.7Display2.6
9.0Battery life7.6
9.6Health tracking4.9
9.5Sports & outdoor6.2
8.6Build & durability5.8
Dimensions
Size comparison
T-Rex 3 ProInstinct 3 45mm Solar
| T-Rex 3 Pro | Instinct 3 45mm Solar | Difference | |
|---|---|---|---|
| Height | 48 mm | 45 mm | +3 mm |
| Width | 48 mm | 45 mm | +3 mm |
| Thickness | 14 mm | 14.9 mm | −0.9 mm |
| Weight | 74 g | 52 g | +22 g |
Drawn to the same scale from the official dimensions (front and side).
Why is T-Rex 3 Pro better than Instinct 3 45mm Solar?
- GPS battery life85 h vs 40 h2.1×
- AMOLED / OLED displayYes · Instinct 3 45mm Solar: No
- Resolution (width)480 px vs 176 px2.7×
- Pixel density466 ppi vs 139 ppi3.4×
- Sapphire crystalYes · Instinct 3 45mm Solar: No
- Screen size1.5″ vs 1.27″+18%
- Sport profiles180 vs 94+91%
- GPS battery life (dual-band)38 h vs 24 h+58%
- Thickness14 mm vs 14.9 mm+6%
Why is Instinct 3 45mm Solar better than T-Rex 3 Pro?
- Battery life (smartwatch mode)25 days vs 28 days+12%
- Weight74.5 g vs 52 g+43%
Specifications
Side by side
| Design & durability | ||
| Case size | 48 mm | 45 mm |
| Weight | 74.5 g | 52 g |
| Thickness | 14 mm | 14.9 mm |
| Height | 48 mm | 45 mm |
| Width | 48 mm | 45 mm |
| Case material | Plastic / polymer | Aluminium |
| Sapphire crystal | Yes | No |
| Lens / cover glass | Sapphire glass | Power Glass™ |
| Strap material | — | silicone |
| Water resistance | 10 ATM | 10 ATM |
| Water rating (maker) | — | 10 ATM |
| Display | ||
| Screen size | 1.5″ | 1.27″ |
| Display technology | AMOLED | Memory-in-pixel (transflective) |
| Panel | AMOLED | Monochrome, sunlight-visible, transflective memory-in-pixel |
| AMOLED / OLED display | Yes | No |
| Always-on display | — | Yes |
| Touchscreen | Yes | — |
| Resolution (width) | 480 px | 176 px |
| Resolution (height) | 480 px | 176 px |
| Pixel density | 466 ppi | 139 ppi |
| Peak brightness | 3,000 nits | — |
| Battery | ||
| Battery life (smartwatch mode) | 25 days | 28 days |
| Battery saver mode | — | 65 days |
| GPS battery life | 85 h | 40 h |
| GPS battery life (dual-band) | 38 h | 24 h |
| Battery capacity | 700 mAh | — |
| Battery type | — | Lithium ion |
| Solar charging | — | Yes |
| Wireless charging | — | No |
| Charging | — | Garmin proprietary plug charger |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| Skin temperature | Yes | — |
| Temperature sensor | Yes | Yes |
| HRV tracking | — | Yes |
| Sleep tracking | Yes | Yes |
| Sensors | — | GPS, GLONASS, Galileo, SatIQ technology, Elevate wrist heart rate monitor, Pulse Ox blood oxygen saturation monitor, Barometric altimeter, Compass, Gyroscope, Accelerometer, Thermometer |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Dual-band GPS | Yes | Yes |
| Satellite systems | — | GLONASS, GALILEO |
| Offline maps | Yes | — |
| Barometric altimeter | Yes | Yes |
| Compass | Yes | Yes |
| Multisport / triathlon mode | — | Yes |
| Sport profiles | 180 | 94 |
| LED flashlight | Yes | Yes |
| Connectivity | ||
| NFC payments | — | Yes |
| Wi-Fi | Wi-Fi 4 | — |
| Bluetooth | 5.2 | — |
| ANT+ sensors | — | Yes |
| Smart features | ||
| Calls from the wrist | Yes | — |
| Speaker | Yes | — |
| Microphone | Yes | — |
| Voice assistant | Yes | — |
| Music on the watch | Yes | — |
| Storage | — | 0.12 GB |
| Third-party apps | — | Yes |
| Platform | ||
| Operating system | — | Garmin OS |
| Platform | Proprietary | Proprietary |
| Works with | Android, iOS | iOS, Android |
