Amazfit T-Rex 3 vs Amazfit T-Rex 3 Pro
The T-Rex 3 Pro is the better watch on paper: it lasts longer on GPS (85 hours), is lighter and has a brighter screen. The T-Rex 3 doesn't beat it on any spec that matters.
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Key differences
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Battery life
Evenly matched
Similar battery life: up to 27 days and 25 days.
-
GPS
T-Rex 3 Pro wins
The Amazfit T-Rex 3 Pro adds multi-band GPS for more accurate tracks.
-
Display
Evenly matched
Both have AMOLED screens of a similar size.
-
Health
Evenly matched
Much the same health sensors.
-
Weight
T-Rex 3 Pro wins
The Amazfit T-Rex 3 Pro is lighter: 52 g against 68.3 g.
Which one should you choose?
Choose the T-Rex 3 if…
- You prefer its look and app: it covers the same essentials as the T-Rex 3 Pro.
Choose the T-Rex 3 Pro if…
- You do long runs, rides or hikes: it's rated for 85 hours with GPS.
- You wear it to bed or have small wrists: it weighs 52 g.
- You're outside a lot: its screen reaches 3,000 nits.
Full spec comparison
The T-Rex 3 Pro leads on battery life and size and durability; elsewhere the two are closely matched.
Green cells with a ✓ mark the better spec in that row. Tick "Show differences only" to hide the rows where they match.
Overview
| Spec | Amazfit T-Rex 3 | Amazfit T-Rex 3 Pro |
|---|---|---|
| Brand | Amazfit | Amazfit |
| Series | T-Rex | T-Rex |
| Versions | — | 48mm, 44mm |
| Colours | Haze Grey | Tactical Black, Black Gold |
Platform & apps
Both work with the same phones and software.
| Spec | Amazfit T-Rex 3 | Amazfit T-Rex 3 Pro |
|---|---|---|
| Operating system | Zepp OS | Zepp OS |
| Works with | iPhone and Android | iPhone and Android |
| Minimum iOS | — | iOS 15 |
| Minimum Android | — | Android 7 |
| RAM | 64 MB | 64 MB |
| Storage | 32 GB | 26 GB |
| Subscription | — | Not needed |
Display
The T-Rex 3 Pro is ahead on the display.
It has a brighter screen, and the T-Rex 3 doesn't beat it on anything here.
| Spec | Amazfit T-Rex 3 | Amazfit T-Rex 3 Pro |
|---|---|---|
| Display type | AMOLED | AMOLED |
| Screen size | 1.5 in | 1.5 in |
| Resolution | 480 x 480 | 480 x 480 |
| Pixel density | 322 ppi | — |
| Peak brightness | 2,000 nits | 3,000 nits |
| Colour display | Yes | Yes |
| Touchscreen | Yes | Yes |
| Controls | touchscreen | touchscreen, buttons |
Design & durability
The T-Rex 3 Pro is ahead on size and durability.
It is lighter, has a sapphire lens and comes in 2 sizes, and the T-Rex 3 doesn't beat it on anything here.
| Spec | Amazfit T-Rex 3 | Amazfit T-Rex 3 Pro |
|---|---|---|
| Case sizes | 48.5 mm | 44 / 48 mm |
| Case shape | Round | Round |
| Dimensions | 48.5 x 48.5 x 13.8 mm | 48 x 48 x 14 mm |
| Thickness | 13.8 mm | 14 mm |
| Weight (case) | 68.3 g | 52 g |
| Case material | Polymer, Stainless steel | fiber-reinforced polymer |
| Bezel material | — | Grade 5 Titanium |
| Lens | Corning Gorilla Glass | Sapphire Glass |
| Band material | silicone | silicone |
| Band width | 22 mm | 22 mm |
| Band fitting | — | 22mm Quick Release |
| Fits wrists | 145-210 mm | 145-210 mm |
| Water resistance | 10 ATM | 10 ATM |
| Water standard | — | ISO 22810:2010 |
| MIL-STD-810 tested | — | Yes |
Battery
The T-Rex 3 Pro is ahead on battery life.
It lasts longer on GPS (85 hours), and the T-Rex 3 doesn't beat it on anything here.
| Spec | Amazfit T-Rex 3 | Amazfit T-Rex 3 Pro |
|---|---|---|
| Battery (smartwatch mode) | 27 days | 25 days |
| Battery (GPS) | 42 hours | 3.5 days |
| Battery (multi-band GPS) | — | 38 hours |
| All battery modes | Smartwatch: 27 days; GPS: 42 hours; Battery saver: 40 days | Smartwatch: 25 days; Multi-band GPS: 38 hours; Battery saver: 3.1 days; GPS: 3.5 days; Max battery GPS: 4.8 days |
| Battery capacity | 700 mAh | 700 mAh |
| Battery type | Built-in battery | Built-in battery |
| Charging | cradle | puck |
| Full charge time | 180 min | 180 min |
GPS & navigation
Both have built-in GPS with similar capabilities.
| Spec | Amazfit T-Rex 3 | Amazfit T-Rex 3 Pro |
|---|---|---|
| GPS | Built-in | Built-in |
| Multi-band GPS | — | Yes |
| Automatic GNSS mode | — | Yes |
| Maps | — | Downloadable maps |
| Navigation features | — | turn-by-turn, round-trip routing, back-to-start, waypoints, course import |
| Golf courses | — | 40,000 |
| Ski maps | — | Yes |
Health & sensors
The T-Rex 3 Pro is ahead on health tracking.
It tracks sleep in more depth, and the T-Rex 3 doesn't beat it on anything here.
| Spec | Amazfit T-Rex 3 | Amazfit T-Rex 3 Pro |
|---|---|---|
| Sensors | optical HR, SpO2, accelerometer, gyroscope, ambient light, compass, barometer, thermometer, skin temperature | optical HR, SpO2, skin temperature, accelerometer, gyroscope, barometer, compass, ambient light, thermometer, depth |
| Heart-rate sensor | — | BioTracker 6.0 |
| Heart-rate tracking | — | 24/7 |
| High/low heart-rate alerts | — | Yes |
| Heart-rate variability | — | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| Skin temperature | Yes | Yes |
| Respiration rate | — | Yes |
| Blood pressure | — | sensor |
| Sleep tracking | Basic | Sleep score |
| Stress tracking | Yes | Yes |
| Energy score | — | BioCharge |
| Readiness score | — | Readiness |
| Cycle tracking | — | Yes |
Safety
Both offer much the same safety features.
| Spec | Amazfit T-Rex 3 | Amazfit T-Rex 3 Pro |
|---|---|---|
| Fall detection | — | No |
| Live tracking | — | Yes |
Training
Training features are evenly matched.
| Spec | Amazfit T-Rex 3 | Amazfit T-Rex 3 Pro |
|---|---|---|
| Sport profiles | — | 187 |
| Auto activity detection | — | Yes |
| Triathlon / multisport | Yes | Yes |
| Swim tracking | — | Pool and open water |
| Training metrics | — | VO2 max, training load, training effect, lactate threshold, recovery time |
| Adaptive coaching | — | Yes |
| Heart-rate broadcast | — | Yes |
| External sensors | — | Bluetooth HR strap, power meter, foot pod, speed/cadence |
Smart features
Both offer much the same smart features.
| Spec | Amazfit T-Rex 3 | Amazfit T-Rex 3 Pro |
|---|---|---|
| Notifications | Yes | Yes |
| Message replies | — | Android |
| Calls on the watch | — | Yes |
| Speaker | No | Yes |
| Microphone | Yes | Yes |
| Voice assistant | — | Zepp Flow |
| Cellular | — | None |
| Music storage | Yes | Yes |
| Wi-Fi | — | Wi-Fi 2.4GHz |
| Bluetooth | Bluetooth 5.2 | Bluetooth 5.2 |
| Find my phone | Yes | Yes |
| Flashlight | — | Yes |
Diving, golf & more
Neither has a specialist edge here.
| Spec | Amazfit T-Rex 3 | Amazfit T-Rex 3 Pro |
|---|---|---|
| Specialist modes | hunting | golf, hunting, ski |
| Diving | — | Single-gas dive computer |
| Max dive depth | — | 45 m |
| Dive standard | — | EN 13319:2000, ISO 6425:2018, GB/T 18828-2022 |