Amazfit T-Rex 3 vs Withings ScanWatch 2: which should you buy?

Answer worked out Oct. 31, 2026

Amazfit T-Rex 3 price: Checked Oct. 30, 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 running and workouts and heart rate and sleep.

Get the Amazfit T-Rex 3 to save $105.

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Amazfit T-Rex 3 vs Withings ScanWatch 2

Amazfit T-Rex 3
AMAZFIT

Amazfit T-Rex 3

$244.99 at Best Buy
Withings ScanWatch 2
WITHINGS

Withings ScanWatch 2

$349.99 at Kohl's
  1. Amazfit T-Rex 3: 10 ATMWater resistance−5 ATMWithings ScanWatch 2: 5 ATM
  2. Amazfit T-Rex 3: 1.5 in AMOLED, 480 × 480, up to 2,000 nits, Gorilla GlassDisplayWithings ScanWatch 2: 0.63-inch DeepGray OLED screen in the dial, 282 PPI
  3. Amazfit T-Rex 3: 68.3g without strapWeightWithings ScanWatch 2: 34.6 g (38 mm), 52.6 g (42 mm), without wristband
  4. Amazfit T-Rex 3: Dual-band GPS, 6 satellite systems; Bluetooth 5.2; Wi-Fi; microphone (no speaker); offline mapsConnectivityWithings ScanWatch 2: Bluetooth to your phone; uses your phone's GPS for outdoor workouts
  5. Amazfit T-Rex 3: $244.99Price today$105 apartWithings ScanWatch 2: $349.99
Amazfit T-Rex 3
Buy at Best Buy$244.99
We may earn a commission.
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 3: 10 ATM (10 ATM; certified for freediving to 147 ft (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 3 Guide names it for outdoor adventure, hiking and navigation.Outdoor adventure: Military-grade build, freediving certification to 147 feet, and it shrugged off rocky Colorado mountain terrain. Source linkedSourceHiking: It logs up to 42 hours in accurate GPS mode during extended hiking trips. Source linkedSourceNavigation: Dual-band GPS across six satellite systems keeps your position accurate outdoors, and one GPS charge lasted nearly 40 hours. Source linkedSource
  • 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

From what each Guide names the product best for.

Side by side

FeatureAmazfit T-Rex 3Withings ScanWatch 2
Display1.5 in AMOLED, 480 × 480, up to 2,000 nits, Gorilla Glass0.63-inch DeepGray OLED screen in the dial, 282 PPI
Weight68.3g without strap34.6 g , 52.6 g , without wristbandAmazfit68.3 gWithings34.6 g
Water resistance10 ATM5 ATM , fine for swimming, not for divingAmazfit10 ATMWithings5 ATM
ConnectivityDual-band GPS, 6 satellite systemsBluetooth to your phone
Design48.5 × 48.5 × 13.75mmStainless steel case with sapphire glass, 38mm or 42mm
Works withiPhone and Android , Zepp appiPhone and AndroidAmazfit14 andWithings15 and

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Works with your phone

iPhone
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Android
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Sources

AmazfitWithingsWithingsWithings SupportWithings Support
Amazfit T-Rex Dual Solar vs COROS PACE 4