T-Rex 3 vs T-Rex Ultra

6 of 9 tracked specs changed between 2023-03 and 2024-09; launch price moved from $399.99 to $279.99.

What changed: display, weight, battery (smartwatch), battery (gps), water rating, signature.

Launch prices are historical. Price links may earn us a commission. As an Amazon Associate I earn from qualifying purchases. Affiliate disclosure.

	T-Rex 32024-09	T-Rex Ultra2023-03
Launch price	$279.99	$399.99
Display	1.5″ AMOLED, 2000 nits	1.39″ AMOLED, 1000 nits
Weight	68.3 g (no strap)	89 g (with strap)
Battery (smartwatch)	27 days	20 days
Battery (GPS)	42 h; 180 h max	27 h dual-band
Dual-band GNSS	Yes	Yes
Offline maps	Yes	Yes
Water rating	10 ATM, dive-rated	10 ATM
Mic + speaker	Yes	Yes
Signature	Dive-rated flagship with a mic and flashlight	Mud-proof flagship with an 80 h endurance GPS mode

Battery figures are launch-day claims.

As an Amazon Associate I earn from qualifying purchases. Affiliate disclosure.