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

Answer worked out Oct. 31, 2026

Amazfit T-Rex Dual Solar 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 Dual Solar vs Withings ScanWatch 2

Amazfit T-Rex Dual Solar
AMAZFIT

Amazfit T-Rex Dual Solar

$649.99 at Amazon
Withings ScanWatch 2
WITHINGS

Withings ScanWatch 2

$349.99 at Kohl's
  1. Amazfit T-Rex Dual Solar: 10 ATMWater resistance−5 ATMWithings ScanWatch 2: 5 ATM
  2. Amazfit T-Rex Dual Solar: 1.32 in AMOLED, 466 × 466, up to 3,000 nits, sapphire glass; solar charging through the displayDisplayWithings ScanWatch 2: 0.63-inch DeepGray OLED screen in the dial, 282 PPI
  3. Amazfit T-Rex Dual Solar: 69g watch body; strap 25.5gWeightWithings ScanWatch 2: 34.6 g (38 mm), 52.6 g (42 mm), without wristband
  4. Amazfit T-Rex Dual Solar: Dual-band GPS, 6 satellite systems; Bluetooth 5.2; Wi-Fi; speaker and mic for Bluetooth calls; flashlight; preloaded mapsConnectivityWithings ScanWatch 2: Bluetooth to your phone; uses your phone's GPS for outdoor workouts
  5. Amazfit T-Rex Dual Solar: $649.99Price today$300 apartWithings ScanWatch 2: $349.99
Amazfit T-Rex Dual Solar
Buy at Amazfit$649.99
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 Dual Solar: 10 ATM (10 ATM; freediving to 50 m and recreational scuba) 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 Dual Solar Guide names it for travel, hiking and navigation.Travel: Three hours of daily sun on the back stretches a charge from 25 to as many as 51 days, enough for a long trip with no plug. Source linkedSourceHiking: Its dual-sided solar charging extends battery life for hikes far from power outlets. Source linkedSourceNavigation: Plan point-to-point routes right on the watch from preloaded maps, and save up to 100 of them. 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 Dual SolarWithings ScanWatch 2
Display1.32 in AMOLED, 466 × 466, up to 3,000 nits, sapphire glass0.63-inch DeepGray OLED screen in the dial, 282 PPI
Weight69g watch body; strap 25.5g34.6 g , 52.6 g , without wristbandAmazfit69 gWithings34.6 g
Water resistance10 ATM5 ATM , fine for swimming, not for divingAmazfit10 ATMWithings5 ATM
ConnectivityDual-band GPS, 6 satellite systemsBluetooth to your phone
Design51.4mm case, 14.5mm thickStainless steel case with sapphire glass, 38mm or 42mmAmazfit51.4 mmWithings38 mm
Works withiPhone and Android , Zepp appiPhone and AndroidAmazfit15 andWithings15 and

Amazfit T-Rex Dual Solar

Buy at Amazfit$649.99
Checked Oct. 30, 2026

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Works with your phone

iPhone
WorksWorks
Android
WorksWorks

Sources

AmazfitWithingsWithingsWithings SupportWithings Support
Amazfit T-Rex Ultra 2 vs Amazfit T-Rex Dual Solar