Amazfit T-Rex 3 Pro Review

Quick Summary

The T-Rex 3 Pro is Amazfit's rugged outdoor GPS smartwatch, sold in India in 44 mm and 48 mm sizes at ₹34,999 for both. It combines a fibre-reinforced polymer case with a grade 5 titanium bezel and buttons, a sapphire-glass AMOLED display rated up to 3,000 nits, dual-band GPS across six satellite systems, offline maps and 10 ATM water resistance. It also meets the MIL-STD-810H-2019 military-grade standard and has a built-in speaker and microphone. The larger size claims up to 25 days of typical battery life and the smaller up to 17 days. It is built for hikers, trail runners and people who spend long hours outdoors.

Available Variants

The watch comes in two case sizes. The 44 mm version has a 1.32-inch display and a 500 mAh battery, while the 48 mm version has a 1.5-inch display and a 700 mAh battery. Both are priced at ₹34,999 on the brand's India store. Colour options listed are Black Gold, Tactical Black and Arctic Gold, with Arctic Gold listed only for the 44 mm size. Beyond display, battery, weight and strap width, the two share the same features and sensors.

Design & Build Quality

The case is made of fibre-reinforced polymer, which keeps weight down, while the bezel and buttons are grade 5 titanium for strength where the watch takes most knocks. The display is covered in scratch-resistant sapphire glass. This is a sensible mix for a rugged watch, because it keeps the watch from feeling as heavy as an all-metal one.

The 44 mm version measures 44.8 x 44.8 x 13.2 mm and weighs 46.8 g without the strap, and the 48 mm version measures 48 x 48 x 14 mm and weighs 52 g. The 44 mm version uses a 20 mm silicone strap and the 48 mm version a 22 mm strap, so both can use common replacement straps. Both are rated 10 ATM, with freediving and scuba use up to 45 metres listed, which is more water protection than most sports watches offer. The military-grade MIL-STD-810H-2019 certification suggests resistance to shocks and temperature extremes, which suits trekking in the Himalayas or the Western Ghats as well as monsoon runs.

Display

The 44 mm version has a 1.32-inch AMOLED panel at 466 x 466 pixels (353 ppi), and the 48 mm version has a 1.5-inch panel at 480 x 480 pixels (322 ppi). Both are rated for up to 3,000 nits peak brightness, which is meant to keep the screen readable in direct sunlight. The sharper smaller panel and the larger, easier-to-read bigger panel are both good outcomes, so the choice comes down to wrist size and how much you value screen area for maps.

Performance & Software

The watch runs Zepp OS and supports Bluetooth 5.2, BLE and Wi-Fi 2.4 GHz. Storage is listed as a maximum of 26 GB of shared space, used for offline maps and other files. A built-in speaker and microphone support Bluetooth calling, which lets you answer calls on the wrist when the watch is connected to a phone. This is handy on a hike or ride when taking the phone out is awkward.

GPS & Navigation

The watch supports dual-band positioning with six satellite systems, which helps keep the track steady in forests and valleys where a single-band receiver can drift. Offline maps are supported so route guidance can continue without mobile coverage, which is useful in the mountains and remote areas of India where signal is patchy. A barometric altimeter and geomagnetic sensor add height and compass readings that outdoor users rely on. These are the watch's main selling points, though real accuracy depends on terrain and conditions and has not been measured for this review.

Fitness & Health Tracking

Over 180 sports modes are listed. Health tracking includes 24-hour heart rate, blood oxygen and stress monitoring, skin temperature, sleep tracking, a PAI activity score and a BioCharge energy score, all using the BioTracker 6.0 optical sensor. These are wellness indicators for training and recovery and should not be treated as medical readings.

Battery

The 44 mm version has a 500 mAh battery rated for up to 17 days of typical use, with up to 26 hours in accurate GPS mode, 60 hours in long-battery GPS mode and 86 hours at the maximum setting. The 48 mm version has a 700 mAh battery rated for up to 25 days, with 38 hours, 85 hours and 116 hours in the same modes. These are claimed figures, and brightness, always-on display and GPS settings will change what you get. The larger watch is the better pick for multi-day treks. The box holds a magnetic charging head, and the retail listing notes that no cable is included.

Features Assessment

The strongest features are the combination of durability, dual-band GPS, offline maps and long battery life. The flashlight is a real help on night walks, and the 48 mm version lists 200 lux with a 300 lux boost mode. The speaker and microphone are useful, though few people will want long calls on a watch. NFC is not listed, so wrist payments are not on offer.

Ease of Use

The watch pairs with the Zepp app, which handles settings, map downloads and training data. It has physical buttons as well as a touchscreen, which is important for a watch meant to be used with gloves, wet hands or in the cold. The many modes and tools take a little time to learn, but the physical controls make basic operation simple.

Value for Money

At ₹34,999, the T-Rex 3 Pro is a premium product that pays for its toughness, dual-band GPS and offline maps. The same price for both sizes means you pay nothing extra for the bigger battery on the 48 mm model, which makes the larger size the better value if it fits your wrist. For casual users who only need step counts and notifications, it is far more watch than needed.

Who Should Buy It?

Hikers, trekkers, trail runners and cyclists who want a rugged watch with offline maps and multi-day battery will get the most from it. It also suits outdoor workers and anyone who has damaged a regular smartwatch. Buyers with larger wrists should look at the 48 mm version, and those with smaller wrists at the 44 mm.

Who Should Consider Alternatives?

Anyone who wants a slim, dressy watch for office use will find this too chunky. Casual users can spend far less on a basic smartwatch. Those who need NFC payments should look elsewhere, and road runners who care mainly about light weight may prefer a slimmer running watch.