Amazfit T-Rex 3 Pro
Amazfit T-Rex 3 Pro is a watch from 2025, sitting in the premium band at an indicative $399.
It reads 18 of the 33 signals this comparison tracks. Full coverage of activity. Nothing at all from body composition.
By sensor class: 10 at consumer grade. That grade is my classification of the hardware, not a lab test. Those readings come from an optical heart rate sensor, an optical blood oxygen sensor, a skin temperature sensor, a GPS receiver, a barometer and an accelerometer. Blood oxygen is measured through the night, not continuously through the day.
Its 25 days per charge are the 15th longest of the 74 devices of its kind here that publish a figure. The AMOLED screen can stay always on. Multi-band GPS. Rated 10ATM / 100m, fine for swimming and diving. On top of the tracking it also handles offline maps. Case size 48mm (also 44mm). No subscription is required.
Display/battery variant catalogued for the buy comparison; health-signal capability mirrors Amazfit T-Rex 3.
Key specs
What it tracks
Heart & vitals
Sleep
Activity
Fitness
Sources
https://us.amazfit.com/products/t-rex-3-prohttps://runtothefinish.com/amazfit-t-rex-3-pro-review/
Buying for battery life? See every device ranked by battery life
Turn a supported wearable into daily health scores
MyBodyAI reads Fitbit, Oura, Polar and Withings by logging in, and Garmin from a data export, then builds daily recovery, sleep, load and immune scores, a biological age estimate, and early warnings. Optional, and separate from this comparison.
This comparison is free and ad-free. I build and update it on my own. If it saved you hours of research, a coffee genuinely makes my day.
Buy me a coffee