Garmin Lily 2 Active vs Amazfit T-Rex 3

Garmin Lily 2 Active

Garmin Lily 2 Active

vsAmazfit T-Rex 3

Amazfit T-Rex 3

Garmin Lily 2 ActiveAmazfit T-Rex 3
Display1.00 x 0.84 in (25.4 x 21.3 mm) touchscreen LCD, 240 x 201 pixels, 16-level grayscale, hidden behind a patterned lens1.5-inch AMOLED, 480x480, 322 ppi, up to 2,000 nits peak brightness, Gorilla Glass
Body38 x 38 x 11 mm; 29 g; anodized aluminum case and bezel; Corning Gorilla Glass 3 lens; silicone quick-release band; fits 110-175 mm wrists; 5 ATM water rating316L 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
BatteryUp to 9 days in smartwatch mode; up to 9 hours in GPS mode; rechargeable lithium-ionUp 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)
GPSBuilt-in GPS with GLONASS, Galileo and BeiDou—
SensorsGarmin Elevate wrist heart rate, Pulse Ox, compass, accelerometer, ambient light sensorBioTracker 6.0 PPG (heart rate, blood oxygen), accelerometer, gyroscope, geomagnetic sensor, barometric altimeter, ambient light, temperature
HealthBody Battery, sleep score, stress, respiration, women's health tracking, Health Snapshot, meditation and breathwork—
Smart featuresSmart notifications, Garmin Pay, music controls, morning report, Find My Phone, Assistance and Incident Detection—
ConnectivityBluetooth, ANT+; compatible with iPhone and AndroidBluetooth 5.2 and BLE, Wi-Fi 2.4 GHz, NFC (Zepp Pay), microphone
Memory7 timed activities and 14 days of activity tracking data—
ColorsLunar Gold with Bone, Silver with Purple Jasmine, Jasper GreenOnyx, Lava, Haze Gray
Positioning—Dual-band GNSS with six satellite systems; free offline maps, contour maps, ski maps, turn-by-turn navigation
Durability—10 ATM; freediving certified to 45 m (EN13319, ISO 6425, GB/T 18828); operates down to -30 C
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+