Garmin Forerunner 170 vs Amazfit T-Rex 3

Garmin Forerunner 170

Garmin Forerunner 170

vsAmazfit T-Rex 3

Amazfit T-Rex 3

Garmin Forerunner 170Amazfit T-Rex 3
Display1.2-inch (30.4 mm) AMOLED touchscreen, 390x390, optional always-on mode, five-button design, chemically strengthened glass1.5-inch AMOLED, 480x480, 322 ppi, up to 2,000 nits peak brightness, Gorilla Glass
BodyFiber-reinforced polymer bezel, silicone strap; 42.6 x 42.6 x 11.9 mm; 41 g; 20 mm quick-release bands; fits wrists 126-203 mm316L 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 10 days in smartwatch mode (up to 4 days with always-on display), up to 19 days in battery saver mode, up to 20 hours in GPS-only mode, up to 14 hours in all-systems GNSS mode; Forerunner 170 Music: up to 6.5 hours all-systems GNSS with musicUp 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)
Memory4 GB—
PositioningGPS, GLONASS and GalileoDual-band GNSS with six satellite systems; free offline maps, contour maps, ski maps, turn-by-turn navigation
SensorsGarmin Elevate wrist heart rate monitor, Pulse Ox blood oxygen (not available in all countries)BioTracker 6.0 PPG (heart rate, blood oxygen), accelerometer, gyroscope, geomagnetic sensor, barometric altimeter, ambient light, temperature
ConnectivityBluetooth, ANT+; Garmin Pay contactless payments (supported banks and networks); smart notifications and LiveTrack with a paired smartphoneBluetooth 5.2 and BLE, Wi-Fi 2.4 GHz, NFC (Zepp Pay), microphone
Durability5 ATM water resistance10 ATM; freediving certified to 45 m (EN13319, ISO 6425, GB/T 18828); operates down to -30 C
TrainingQuick workouts, Garmin Coach adaptive plans including run/walk, daily suggested workouts, training readiness, training status, wrist-based running power, running dynamics—
Sports80+ built-in sports apps including running, swimming, cycling and strength training170+ sports modes at launch including HYROX race, freediving, ultramarathon and strength training templates
HealthAdvanced sleep tracking, sleep coach, breathing variations, HRV status, lifestyle logging, Health Status—
MusicForerunner 170 Music ($349.99) downloads songs and podcasts from supported third-party services (subscription required) for phone-free listening with wireless headphones—
CompatibilityGarmin Connect app for iPhone and Android; Connect IQ watch faces and data fieldsZepp App on Android 7.0+ and iOS 14.0+
ColorsBlack with black/amp yellow band, whitestone with whitestone/cloud blue band; Music edition also teal green and red pinkOnyx, Lava, Haze Gray
OS—Zepp OS 4 at launch, with Zepp Coach and an AI assistant based on OpenAI GPT-4o