Ask iDevice

Amazfit T-Rex 3 Pro vs COROS PACE 4 Pro: which should you buy?

Answer worked out Oct. 11, 2026. Prices and the answer are worked out again every few minutes.

The answer

Amazfit T-Rex 3 Pro

NO RUSH

No need to rush.

$399.99 at Amazfit is $87 above its lowest price in the last 90 days. At about $327 or less, the answer turns to Buy now.

$399.99 at Amazfit

COROS PACE 4 Pro

FINE TO BUY

No reason to wait, and no deal to chase.

The COROS PACE 4 Pro is new, and its best price today is $449 at COROS. For a model this new, iDevice's advice is to buy it if you want it, not to wait for a drop.

$449 at COROS

Better purchase today: COROS PACE 4 Pro. It reads FINE TO BUY against NO RUSH for Amazfit T-Rex 3 Pro.

Better product: No clear winner. Pick by what each one is best for.

The COROS PACE 4 Pro costs $49.01 more than the Amazfit T-Rex 3 Pro today ($449 at COROS against $399.99 at Amazfit).

Key differences

  • Peak brightness: close (3,000 vs 3,500 nits)Amazfit T-Rex 3 Pro: 3,000 nits ConfirmedSourceCOROS PACE 4 Pro: 3,500 nits ConfirmedSource
  • Water resistance: 10 ATM vs 5 ATMAmazfit T-Rex 3 Pro: 10 ATM (10 ATM; freediving and recreational scuba to 45 m) ConfirmedSourceCOROS PACE 4 Pro: 5 ATM (5 ATM (surface water, not 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.

Who should buy which

  • Pick the Amazfit T-Rex 3 Pro for outdoor adventure.Outdoor adventure: Certified for diving to 45 meters. ConfirmedSource
  • Pick the COROS PACE 4 Pro for running.Running: Built for runners, with race predictions, pace plans and training plans. ConfirmedSource

From what each Guide names the product best for. Both Guides also name battery life and navigation. This does not rank the two.

Side by side

What is comparedAmazfit T-Rex 3 ProCOROS PACE 4 Pro
Best price today$399.99 at AmazfitPrice checked Oct. 11, 2026$449 at COROSPrice checked Oct. 11, 2026
Lowest in 90 days$312.99Seen Oct. 6, 2026$449Seen Sept. 25, 2026
Works withConfirmed Works with Amazfit T-Rex 3 Pro: iPhone: Works. Android: Works.Source: AmazfitConfirmed Works with COROS PACE 4 Pro: iPhone: Works. Android: Works.Source: COROS
TimingOur read No newer model is expected in the next 90 days.Source: iDevice GuideOur read No newer model is expected in the next 90 days.Source: iDevice Guide
PriceOur read Nothing's forcing the decision right now, so there's no need to rush. The lowest price checked in the last 90 days is $312.99 (Oct 6, 2026).Source: iDevice GuideOur read The lowest price checked in the last 90 days is $449 (Sep 25, 2026).Source: iDevice Guide
What could change it
  • If the price falls to about $327 or less, iDevice's price verdict turns to Buy now, as long as a replacement is not close.
  • If a newer model is announced or reported inside 90 days, the answer becomes Wait.
Make it personal: your phone and budget