Amazfit T-Rex Ultra 2 vs Withings ScanWatch 2: which should you buy?

Answer worked out Oct. 31, 2026

Amazfit T-Rex Ultra 2 price: Checked Oct. 31, 2026

Withings ScanWatch 2 price: Checked Oct. 30, 2026

Most people: get the Withings ScanWatch 2, because it is the better fit for more of what people buy these for.

Get the Withings ScanWatch 2 for heart rate and sleep.

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Amazfit T-Rex Ultra 2 vs Withings ScanWatch 2

AMAZFIT

Amazfit T-Rex Ultra 2

$549.99 at Amazon

WITHINGS

Withings ScanWatch 2

$349.99 at Kohl's

Amazfit T-Rex Ultra 2: 10 ATMWater resistance−5 ATMWithings ScanWatch 2: 5 ATM
Amazfit T-Rex Ultra 2: 1.5 in AMOLED, 480 × 480, up to 3,000 nits, sapphire glassDisplayWithings ScanWatch 2: 0.63-inch DeepGray OLED screen in the dial, 282 PPI
Amazfit T-Rex Ultra 2: 89.2g with strapWeightWithings ScanWatch 2: 34.6 g (38 mm), 52.6 g (42 mm), without wristband
Amazfit T-Rex Ultra 2: Dual-band GPS, 6 satellite systems; Bluetooth 5.2; Wi-Fi; speaker and mic; flashlight; 64GB storage; preloaded mapsConnectivityWithings ScanWatch 2: Bluetooth to your phone; uses your phone's GPS for outdoor workouts
Amazfit T-Rex Ultra 2: $549.99Price today$200 apartWithings ScanWatch 2: $349.99

Amazfit T-Rex Ultra 2

Buy at Amazfit$549.99

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Withings ScanWatch 2

Buy at Kohl's$349.99

We may earn a commission.

All the details

Key differences

Water resistance: 10 ATM vs 5 ATMAmazfit T-Rex Ultra 2: 10 ATM (10 ATM; freediving and recreational scuba to 45 m) ConfirmedSourceWithings ScanWatch 2: 5 ATM (5 ATM (50m), fine for swimming, not for diving) ConfirmedSource

From each maker's own specifications. A point is listed only when both makers state a figure and the two differ; a point either maker does not state is left out, never guessed. Two figures measured under different conditions are shown side by side, not compared.

Who should buy which

The Amazfit T-Rex Ultra 2 Guide names it for outdoor adventure, travel and navigation.Outdoor adventure: Freediving or recreational scuba, it is certified for diving to 45 meters. ConfirmedSourceTravel: For a trip, typical use battery life runs up to 30 days, and heavy use up to 15 days. ConfirmedSourceNavigation: Dual-band positioning, 6 satellite systems and a circularly polarized GPS antenna pin down where you are. ConfirmedSource
The Withings ScanWatch 2 Guide names it for health, sleep and fitness.Health: Rest a finger on the bezel for 30 seconds and it records an FDA-cleared ECG that checks for atrial fibrillation. Source linkedSourceSleep: Light and deep sleep, interruptions and overnight HRV are tracked, with a smart wake-up alarm and a Breathing Quality Index. Source linkedSourceFitness: It looks like a classic analog watch, yet counts steps and elevation across more than 40 workout modes. Source linkedSource