Garmin Vivoactive 6 vs Amazfit T-Rex 3

Garmin Vivoactive 6

Garmin Vivoactive 6

vsAmazfit T-Rex 3

Amazfit T-Rex 3

Garmin Vivoactive 6Amazfit T-Rex 3
Display1.2-inch (30.4 mm) AMOLED touchscreen, 390x390 pixels, optional always-on mode, Corning Gorilla Glass 3 lens1.5-inch AMOLED, 480x480, 322 ppi, up to 2,000 nits peak brightness, Gorilla Glass
Case42.2 x 42.2 x 10.9 mm; fiber-reinforced polymer case with anodized aluminum bezel; 23 g (36 g with included silicone band); 20 mm quick-release band; fits wrists of 125-190 mm—
BatteryUp to 11 days in smartwatch mode (5 days with always-on display); Battery Saver smartwatch mode up to 21 days; GPS-only up to 21 hours; all-systems GNSS up to 17 hours; all-systems GNSS with music up to 8 hoursUp to 27 days typical use, up to 13 days heavy use, up to 40 days battery saver, up to 180 hours in GNSS max battery life mode (700 mAh, magnetic charging, about 3 hours for a full charge)
Storage8GB for music, apps and history—
NavigationGPS, GLONASS, Galileo, QZSS and BeiDou; compass, gyroscope, accelerometer—
HealthGarmin Elevate wrist heart rate, Pulse Ox (spot-check, optional all-day and during sleep), Body Battery, advanced sleep with sleep coach, HRV status, respiration, all-day stress, women's health tracking, ambient light sensor—
FeaturesGarmin Pay, music storage with Spotify, Amazon Music and Deezer, 80+ preloaded sports apps, Garmin Coach plans, wheelchair mode, smart wake alarm, Connect IQ, smart notifications—
ConnectivityBluetooth, ANT+, Wi-Fi; works with iPhone and AndroidBluetooth 5.2 and BLE, Wi-Fi 2.4 GHz, NFC (Zepp Pay), microphone
Durability5 ATM water rating (swim)10 ATM; freediving certified to 45 m (EN13319, ISO 6425, GB/T 18828); operates down to -30 C
ColorsBlack/Slate, Bone/Lunar Gold, Jasper Green, Pink DawnOnyx, Lava, Haze Gray
Body—316L stainless steel bezel, polymer middle frame, liquid silicone strap (22 mm); 48.5 x 48.5 x 13.75 mm, 68.3 g without strap; 4 buttons
Positioning—Dual-band GNSS with six satellite systems; free offline maps, contour maps, ski maps, turn-by-turn navigation
Sensors—BioTracker 6.0 PPG (heart rate, blood oxygen), accelerometer, gyroscope, geomagnetic sensor, barometric altimeter, ambient light, temperature
OS—Zepp OS 4 at launch, with Zepp Coach and an AI assistant based on OpenAI GPT-4o
Sports—170+ sports modes at launch including HYROX race, freediving, ultramarathon and strength training templates
Compatibility—Zepp App on Android 7.0+ and iOS 14.0+