Zepp Health dropped the Amazfit Active Max in January 2026, and I reviewed it shortly after launch. A few months earlier, in September 2025, I covered the T-Rex 3 Pro in detail shortly after that watch landed. Both impressed, but for very different reasons. One is a sleek all-rounder with big-screen appeal, the other is built like a tank and packed with rugged tools.
Here’s how the two compare once you get past the shared branding.
View Amazfit T-Rex 3 Pro, Active Max on Zepp Health / Amazon.
Rugged tank or everyday smartwatch
The Active Max is probably the best-looking Amazfit I’ve tested. It’s got a simple, sharp design with a flat display, aluminium frame and a balanced feel. It’s not trying too hard to be sporty or rugged. Just a big, clear watch that doesn’t get in the way. It measures 48.5 by 48.5 by 12.2 millimetres, but feels lighter than the numbers suggest. This is one of those watches you forget you’re wearing.
The T-Rex 3 Pro is the complete opposite. It’s thick, heavy and unapologetically built for the outdoors. The 48mm model uses a titanium bezel, sapphire glass, and stainless steel buttons. It’s tough and it looks it. You also get full dive-rated 10 ATM water resistance and military-standard durability. There’s a smaller 44mm version if you want less bulk, but it still leans rugged. This is the one you’d reach for if you’re heading off trail.
Display and controls make a difference
The Active Max and 48mm T-Rex 3 Pro both use a 1.5 inch AMOLED display at 480 by 480 resolution. The smaller T-Rex 3 Pro model drops to 1.32 inches and 466 by 466, but still looks sharp. All of them are bright enough to hold up well outside, and viewing angles are solid.
You get two physical buttons on the Max, but this is a touch-first experience. Swiping around feels smooth and the interface keeps things easy.
The T-Rex gives you four full buttons that can control the entire UI. That matters when you’re wearing gloves or when the screen’s wet. It also uses sapphire glass, while the Max sticks with a hardened glass that resists fingerprints but won’t be quite as scratch-resistant.
If you like simplicity and speed, the Max is a better fit. If you want something you can operate in the middle of a snowstorm, go with the T-Rex.
Navigation is way deeper on the T-Rex
Both watches support offline maps, which is already a big win at this price. But the T-Rex 3 Pro takes it further.
You get dual-band GNSS and support for six satellite systems. Route planning, point of interest search, turn-by-turn guidance and round-trip routing are all built in. You can load routes from Komoot and sync your activities with Strava. It’s proper outdoor navigation.
The Max can follow basic routes and retrace your path, but there’s no route planner or terrain detail. It’s good enough for casual use, but it’s not built for exploring.
A real flashlight
Only the T-Rex 3 Pro has a built-in LED flashlight, and it’s surprisingly useful. Whether you’re running at night, setting up a tent or just looking for your phone charger under the couch, it comes in handy. It’s easy to trigger and bright enough to be useful. One of those features you don’t think about until it’s not there.
Battery life is solid either way
The Active Max hits up to 25 days with regular use and up to 64 hours in GPS mode. That’s excellent considering how light and thin it is.
The T-Rex 3 Pro 48mm also gives you up to 25 days, though GPS runtime drops to around 38 to 40 hours. The smaller 44mm version goes to about 17 days typical, which is still more than enough for most people.
Whichever one you pick, you won’t be charging it every night.
Smart features are mostly the same
Just like health sensors, the smart features are mostly the same. All models include a mic and speaker for taking Bluetooth calls. You get music storage, notifications, weather, alarms and calendar sync. The latest version of Zepp OS runs smoothly on all of them.
The Max supports Bluetooth 5.3 but skips Wi-Fi and NFC. The T-Rex adds both, though NFC depends on region. If you want wider connectivity, the Pro gives you more options.
Which to go for
If you want a watch that looks good, feels comfortable and just works without any fuss, the Active Max is the one to grab. It does all the basics well, lasts for days and doesn’t feel like a fitness tracker strapped to your wrist.
The T-Rex 3 Pro is for those who want something chunkier, tougher and loaded with extras. You’re getting proper outdoor features like dual-band GPS, a built-in flashlight and full button control. It’s more watch for more demanding use.
Both hold up. It just comes down to whether you want something sleek or something built to take a hit.
View Amazfit T-Rex 3 Pro, Active Max on Zepp Health / Amazon.
Amazfit Active Max vs T-Rex 3 Pro: Tech specs comparison
Specification
Amazfit Active Max
T-Rex 3 Pro 48mm
T-Rex 3 Pro 44mm
Display
1.5″ AMOLED, 480×480, 3000 nits
1.5″ AMOLED, 480×480, 3000 nits
1.32″ AMOLED, 466×466, 3000 nits
Glass
Strengthened glass with AF coating
Sapphire crystal
Sapphire crystal
Case dimensions
48.5 × 48.5 × 12.2 mm
48 × 48 × 14 mm
44.8 × 44.8 × 13.2 mm
Weight (without strap)
39.5 g
52 g
46.8 g
Build materials
Aluminium frame, polymer case
Titanium bezel/buttons, polymer case
Titanium bezel/buttons, polymer case
Water resistance
5 ATM
10 ATM + scuba/freedive certified
10 ATM + scuba/freedive certified
Physical buttons
2
4
4
GNSS
Single-band (5 systems)
Dual-band (6 systems)
Dual-band (6 systems)
Navigation
Offline maps, basic route guidance
Full offline maps with POI, rerouting
Full offline maps with POI, rerouting
Sensors
BioTracker PPG, acceleration, gyroscope, geomagnetic, barometric altimeter, ambient light, temperature
BioTracker PPG, acceleration, gyroscope, geomagnetic, barometric altimeter, ambient light, temperature
BioTracker PPG, acceleration, gyroscope, geomagnetic, barometric altimeter, ambient light, temperature
Battery (typical use)
Up to 25 days
Up to 25 days
Up to 17 days
Battery (GPS use)
Up to 64 hours
Up to 38–40 hours
Up to 38–40 hours
OS
Zepp OS
Zepp OS 5.0
Zepp OS 5.0
Connectivity
BLE 5.3, no Wi-Fi, no NFC
BLE 5.2, Wi-Fi, NFC
BLE 5.2, Wi-Fi, NFC
Microphone and speaker
Yes
Yes
Yes
Music storage
Yes
Yes
Yes
Strap
22 mm silicone, pin buckle
22 mm silicone, quick release
22 mm silicone, quick release
Sport modes
~170
~180
~180
BioCharge
Yes
Yes
Yes
Price category
Mid-range
Premium
Premium
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