| General | |
|---|---|
| Manufacturer | Amazfit (Zepp Health) |
| Type | Rugged outdoor GPS smartwatch |
| Series | T-Rex |
| Released | 5 September 2025 |
| Price at launch | GBP 399.90 / USD 399 |
| Predecessor | T-Rex 3 |
| Successor | Not yet announced. See Release Radar. |
| Sizes | 48mm (medium), 44mm (small) |
| Colours | 48mm: Tactical Black, Black Gold. 44mm: Tactical Black, Black Gold, Arctic Gold |
Specifications and features as at launch.
Jump to: Expert opinion | What’s new | Specifications | Battery life | Features | Activity profiles | Further reading
Expert opinion
The T-Rex 3 Pro adds a Grade 5 titanium bezel and buttons, sapphire glass, a brighter 3,000-nit display, a dual-colour LED flashlight, microphone and speaker, and additional routing features over the T-Rex 3. It is offered in two sizes: a 48mm model with a 1.5 inch display and a 44mm model with a 1.32 inch display.
The 44mm model is the first small-case option in the T-Rex line, extending the range to smaller wrists. Both sizes carry dual diving certification to 45 metres, 180-plus sports modes, and BioCharge, which the standard T-Rex 3 does not support. At the time of writing, the watch has not been tested on this site for accuracy or feature reliability.
What’s new versus the T-Rex 3
Hardware
- Grade 5 titanium bezel and buttons, replacing stainless steel
- Sapphire glass lens, replacing Corning Gorilla Glass
- Peak brightness raised to 3,000 nits, from 2,000 nits
- Second size option: 44mm with 1.32 inch display, alongside the 48mm
- Speaker added, enabling Bluetooth calls
- Dual-colour LED flashlight with Boost and SOS modes
- Quick-release strap attachment, replacing the special-tool fitting
- Scuba diving certification added alongside freediving
Software
- Zepp OS 5, up from Zepp OS 4.5
- BioCharge readiness, not supported on the T-Rex 3
- Round-trip route creation
- Point-of-interest search
- Auto-rerouting
- Recreational diving mode
- 180-plus sports modes, up from 170-plus
Specifications
The specifications below are for the 48mm model. The 44mm model differs on display size (1.32 inch, 466 x 466, 353 PPI), dimensions (44.8 x 44.8 x 13.2mm), weight (46.8g), battery (500 mAh), and strap width (20mm).
| Display | |
|---|---|
| Size | 1.5 inch (48mm model) |
| Type | AMOLED |
| Resolution | 480 x 480 pixels |
| PPI | 322 |
| Peak brightness | 3,000 nits |
| Lens | Sapphire glass |
| Touchscreen | Yes |
| Physical | |
| Case size | 48mm (medium) |
| Thickness | 14mm |
| Weight | 52g (without strap) |
| Case material | Grade 5 titanium bezel and buttons, fibre-reinforced polymer case |
| Water rating | 10 ATM, freediving and scuba to 45m (EN13319, ISO 6425, GB/T 18828) |
| Durability | MIL-STD-810H-2019 (report H202505284651-01EN) |
| Strap width | 22mm quick release |
| Sensors and positioning | |
| GPS | Dual-band, six satellite systems, circularly-polarized antenna |
| Heart rate | BioTracker 6.0 PPG (5PD + 2LED) |
| Other sensors | Blood-oxygen, barometric altimeter, geomagnetic, gyroscope, acceleration, temperature, ambient light |
| Connectivity and storage | |
| Connectivity | Wi-Fi 2.4GHz, Bluetooth 5.2 BLE, NFC (Zepp Pay) |
| Storage | Up to 26GB usable for maps, music and data |
| Music | Onboard storage, playback via speaker or Bluetooth headphones |
Battery life
The figures below are for the 48mm model with its 700 mAh cell. The 44mm model, with a 500 mAh cell, is rated at up to 17 days typical use, 26 hours Accurate GPS, 51 hours Power Saving GPS, 60 hours GPS Long Battery Life, and 86 hours GPS Max Battery Life.
| Mode | Battery life (48mm) |
|---|---|
| Typical use | Up to 25 days |
| Heavy use | Up to 10 days |
| Accurate GPS | Up to 38 hours |
| Power Saving GPS | Up to 74 hours |
| GPS Long Battery Life | Up to 85 hours |
| GPS Max Battery Life | Up to 116 hours |
| Low temperature (GPS on) | Up to 25 hours |
| Low temperature (GPS off) | Up to 25 days |
The cell charges via a magnetic head. GPS Long Battery Life and Max Battery Life work only within Hiking and Climbing modes. A USB-C cable is required and not supplied.
Features
Plan
- Zepp Coach adaptive training plans, 5K to marathon
- Offline base, contour and ski resort maps
- Turn-by-turn navigation and off-route alerts
- Round-trip route creation and point-to-point planning
- Auto-rerouting
- Point-of-interest search
- Save location points and direct return navigation
- BioCharge readiness
- Sleep, blood-oxygen and stress monitoring
Prepare
- VO2 Max and real-time performance
- Training load and training effect
- PeakBeats workout status
- PAI health assessment
- Heart rate belt, running power meter and cycling sensor pairing
Perform
- 187 sports modes
- HYROX race, PFT and training modes
- Freediving, scuba and recreational diving to 45 metres
- Strength training with 25 auto-recognized exercises
- Track Run mode with smart trajectory correction
- Virtual pacer
- Dual-colour LED flashlight with Boost and SOS modes
- Environment tools: compass, barometer, altitude, storm alerts, sun and moon, tide
Connect
- Bluetooth calls
- Zepp Flow voice control and speech-to-text replies (Android)
- Zepp Pay contactless payments
- Sync to Strava, Relive, Runkeeper, adidas Running, Komoot, TrainingPeaks, Intervals.icu, Treinus, Apple Health, Google Fit
- Smart notifications
- Find My Phone
Activity profiles
| Category | Profiles |
|---|---|
| Running | Outdoor running, Treadmill, Walking, Trail running, Indoor walking, Race walking, Track run, Ultramarathon, Dog walking |
| Cycling | Outdoor cycling, Indoor cycling, Mountain biking, BMX, E-Bike, E-MTB, Gravel cycling, Bicycle commuting, Bicycle touring, Road cycling, Cyclocross |
| Swimming | Pool swimming, Open water swimming, Fin swimming, Artistic swimming |
| HYROX | HYROX race, HYROX PFT, HYROX training |
| Gym and fitness | Elliptical, Rowing machine, Stair-climbing machine, Stair stepper, Spinning, Indoor fitness, Mixed aerobics, Cross-training, Aerobics, Group calisthenics, Body combat, Strength training, Step training, Core training, Flexibility training, Free training, HIIT, Yoga, Pilates, Gymnastics, Horizontal bar, Parallel bars, Battling ropes, Stretching, Bouldering, Indoor rock climbing, Ski machine, Boxing, Wrestling, Martial arts, Tai Chi, Muay Thai, Judo, Taekwondo, Karate, Kickboxing, Fencing, Jiu-Jitsu, Kendo |
| Outdoor | Climbing, Hiking, Mountain hiking, Rucking, Orienteering, Rock climbing, Fishing, Hunting, Skateboarding, Roller skating, Parkour, ATV, Offroad motorcycle |
| Other | Diving: Outdoor freediving, Indoor freediving, Recreational diving, Spearfishing. Winter sports: Skiing, Snowboarding, Downhill skiing, Cross-country skiing, Ski orienteering, Biathlon, Outdoor skating, Indoor skating, Curling, Bobsleigh and tobogganing, Sledding, Snowmobile, Snowshoeing, Ski mountaineering. Water sports: Outdoor boating, Sailing, Kayak, Rowing, Dragon boat, Paddleboarding, Indoor surfing, Tubing, Water skiing, Snorkeling, Kitesurfing, Surfing, Wakesurfing. Extreme sports: Skydiving, Paragliding, Wingsuit flying. Ball sports: Soccer, Basketball, Volleyball, Tennis, Badminton, Table tennis, Golf swing, Pickleball, Padel, Cricket, Rugby, Hockey, and others. Dance: Zumba, Ballet, Street dance, Latin dance, and others. Other: Jumping rope, Archery, Equestrianism, Driving, Stair climbing, Triathlon, Multisport, Snow shoveling. |
