Amazfit Balance 2 vs Amazfit T-Rex 3
The real choice is the kind of watch: the Balance 2 is a smartwatch and the T-Rex 3 is a sports watch. Beyond that, the Balance 2 is lighter, while the T-Rex 3 lasts longer (27 days).
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Key differences
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Battery life
T-Rex 3 wins
The Amazfit T-Rex 3 lasts up to 27 days against 21 days.
-
GPS
Balance 2 wins
The Amazfit Balance 2 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
Balance 2 wins
The Amazfit Balance 2 is lighter: 43 g against 68.3 g.
Other differences
- Type Depends on you
They're built for different jobs: the Balance 2 is a smartwatch and the T-Rex 3 is a sports watch.
Which one should you choose?
Choose the Balance 2 if…
- You want apps, messages and a bright screen first: it is a full smartwatch.
- You wear it to bed or have small wrists: it weighs 43 g.
- You want to sleep better: it scores each night and tells you what to change.
Choose the T-Rex 3 if…
- Training comes first: it is a sports watch built around GPS, battery and workout data.
- You hate charging: it's rated for up to 27 days in smartwatch mode.
- You work out with music: it stores songs on the watch.
Full spec comparison
The Balance 2 leads on size and durability, while the T-Rex 3 leads on battery life.
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 Balance 2 | Amazfit T-Rex 3 |
|---|---|---|
| Brand | Amazfit | Amazfit |
| Series | Balance | T-Rex |
| Colours | Black | Haze Grey |
| Also sold as | Balance 2 Series | — |
Platform & apps
They are different kinds of watch, so start with how you will use it.
| Spec | Amazfit Balance 2 | Amazfit T-Rex 3 |
|---|---|---|
| Operating system | Zepp OS | Zepp OS |
| Works with | iPhone and Android | iPhone and Android |
| Minimum iOS | iOS 15 | — |
| Minimum Android | Android 7 | — |
| RAM | 3 MB | 64 MB |
| Storage | — | 32 GB |
| Subscription | Not needed | — |
Display
The screens are closely matched.
| Spec | Amazfit Balance 2 | Amazfit T-Rex 3 |
|---|---|---|
| Display type | AMOLED | AMOLED |
| Screen size | 1.5 in | 1.5 in |
| Resolution | 480 x 480 | 480 x 480 |
| Pixel density | 323 ppi | 322 ppi |
| Peak brightness | 2,000 nits | 2,000 nits |
| Colour display | Yes | Yes |
| Touchscreen | Yes | Yes |
| Controls | touchscreen, buttons | touchscreen |
Design & durability
The Balance 2 is ahead on size and durability.
It is lighter, is slimmer and has a sapphire lens, and the T-Rex 3 doesn't beat it on anything here.
| Spec | Amazfit Balance 2 | Amazfit T-Rex 3 |
|---|---|---|
| Case sizes | 47.4 mm | 48.5 mm |
| Case shape | Round | Round |
| Dimensions | 47.4 x 47.4 x 12.3 mm | 48.5 x 48.5 x 13.8 mm |
| Thickness | 12.3 mm | 13.8 mm |
| Weight (case) | 43 g | 68.3 g |
| Case material | Aluminum alloy frame, fiber-reinforced polymer case | Polymer, Stainless steel |
| Lens | Sapphire Glass | Corning Gorilla Glass |
| Band material | silicone | silicone |
| Band width | 22 mm | 22 mm |
| Band fitting | 22 mm | — |
| Fits wrists | 140-210 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 is ahead on battery life.
It lasts longer (27 days), and the Balance 2 doesn't beat it on anything here.
| Spec | Amazfit Balance 2 | Amazfit T-Rex 3 |
|---|---|---|
| Battery (smartwatch mode) | 21 days | 27 days |
| Battery (GPS) | 33 hours | 42 hours |
| All battery modes | Smartwatch: 21 days; GPS: 33 hours; Battery saver: 2.8 days | Smartwatch: 27 days; GPS: 42 hours; Battery saver: 40 days |
| Battery capacity | 658 mAh | 700 mAh |
| Battery type | Built-in battery | Built-in battery |
| Charging | puck | cradle |
| Full charge time | 120 min | 180 min |
GPS & navigation
Both have built-in GPS with similar capabilities.
| Spec | Amazfit Balance 2 | Amazfit T-Rex 3 |
|---|---|---|
| GPS | Built-in | Built-in |
| Multi-band GPS | Yes | — |
| Satellite systems | GPS, GLONASS, Galileo | — |
| Maps | Downloadable maps | — |
| Navigation features | turn-by-turn, round-trip routing | — |
| Golf courses | 40,000 | — |
| Ski maps | Yes | — |
Health & sensors
The Balance 2 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 Balance 2 | Amazfit T-Rex 3 |
|---|---|---|
| Sensors | optical HR, SpO2, skin temperature, accelerometer, gyroscope, barometer, compass, ambient light, thermometer | optical HR, SpO2, accelerometer, gyroscope, ambient light, compass, barometer, thermometer, skin temperature |
| Heart-rate sensor | BioTracker 6.0 PPG biometric sensor | — |
| Heart-rate tracking | 24/7 | — |
| High/low heart-rate alerts | Yes | — |
| Heart-rate variability | Yes | — |
| Blood oxygen (SpO2) | Yes | Yes |
| Skin temperature | Yes | Yes |
| Sleep tracking | Sleep score | Basic |
| Stress tracking | Yes | Yes |
| Energy score | BioCharge | — |
| Readiness score | Recovery Status | — |
| Cycle tracking | Yes | — |
Training
Training features are evenly matched.
| Spec | Amazfit Balance 2 | Amazfit T-Rex 3 |
|---|---|---|
| Sport profiles | 180 | — |
| Auto activity detection | Yes | — |
| Triathlon / multisport | Yes | Yes |
| Swim tracking | Pool and open water | — |
| Training metrics | VO2 max, training load, training effect, recovery time, race predictor, lactate threshold, HRV status | — |
| Adaptive coaching | Yes | — |
| Running dynamics | Yes | — |
| Wrist running power | Yes | — |
| Strength rep counting | Yes | — |
| External sensors | Bluetooth HR strap, power meter, foot pod, speed/cadence | — |
Smart features
Both offer much the same smart features.
| Spec | Amazfit Balance 2 | Amazfit T-Rex 3 |
|---|---|---|
| Notifications | Yes | Yes |
| Message replies | Android | — |
| Speaker | Yes | No |
| Microphone | Yes | Yes |
| Voice assistant | Zepp Flow | — |
| Music storage | — | Yes |
| Wi-Fi | Wi-Fi 2.4 GHz | — |
| Bluetooth | Bluetooth 5.2 | Bluetooth 5.2 |
| Find my phone | Yes | Yes |
| Flashlight | No | — |
Diving, golf & more
Neither has a specialist edge here.
| Spec | Amazfit Balance 2 | Amazfit T-Rex 3 |
|---|---|---|
| Specialist modes | golf, ski | hunting |
| Max dive depth | 45 m | — |
| Dive standard | EN 13319:2000 | — |