Amazfit T-Rex 3 Pro vs Coros APEX 4 46mm
Amazfit T-Rex 3 Pro (2025, listed at $379) and Coros APEX 4 46mm (2025, listed at $479) are both sport watches, so the choice comes down to specifics.
Specs last updated · table prices are list prices; each card shows Amazon's current price when available
Amazfit T-Rex 3 Pro
Rugged AMOLED upgraded — sapphire glass, brighter 3,000-nit screen and improved dual-band GPS.
Coros APEX 4 46mm
Titanium-bezel MIP mountain watch: sapphire glass, dual-frequency GPS, offline maps, voice pins via mic and speaker, 24 days of daily use and 65 hours of GPS.
The verdict
On the numbers we track, Amazfit T-Rex 3 Pro wins on battery life (25 days vs 24 days), price ($379 vs $479), tracked features (6 vs 4) and water rating (10ATM vs 5ATM); Coros APEX 4 46mm wins on weight (64 g vs 70 g).
Bottom line: on raw specs the Amazfit T-Rex 3 Pro leads 4 to 1, but five spec categories are only a starting point. Match it to your phone, your main sport and your budget before you decide, or run the free quiz to see how each ranks for your answers.
Spec by spec
| Spec | Amazfit T-Rex 3 Pro | Coros APEX 4 46mm |
|---|---|---|
| Battery (rated) | 25 days | 24 days |
| Weight | 70 g | 64 g |
| List price | $379 | $479 |
| Water rating | 10ATM | 5ATM |
| Tracked features | 6 | 4 |
| Case size | 48 mm | 46.2 mm |
| Display | AMOLED | MIP |
| Works with | both iPhone and Android | both iPhone and Android |
| Listed best for | outdoor adventure and multisport and triathlon | outdoor adventure, multisport and triathlon and running |
| Released | 2025 | 2025 |
Trophy marks the better value on the five measurable specs. Battery is the manufacturer's rating, not our test. How we score is on the methodology page.
Feature overlap
Both have (4)
- built-in GPS
- blood-oxygen (SpO₂)
- on-device music
- offline maps
Only Amazfit T-Rex 3 Pro (2)
- AMOLED display
- swim tracking
Only Coros APEX 4 46mm (0)
Nothing unique.
Which one should you pick?
Pick the Amazfit T-Rex 3 Pro if…
- You want to spend less: it lists for $100 less.
- You want fewer charges: about 25 days per charge vs 24 days.
- You need AMOLED display and swim tracking, which the Coros APEX 4 46mm does not list.
- You might switch phones: it works with both iPhone and Android, the Coros APEX 4 46mm only works with Android.
- You swim or paddle: 10ATM vs 5ATM.
Skip it if…
- • You have a small wrist (under about 160 mm) — the 48 mm case we list is large (check whether a smaller size is sold).
- • You want something light enough to sleep in — it weighs 70 g.
Pick the Coros APEX 4 46mm if…
- You want a lighter watch: 64 g vs 70 g.
- Your main use is running: it is listed for that and the Amazfit T-Rex 3 Pro is not.
- You might switch phones: it works with both iPhone and Android, the Amazfit T-Rex 3 Pro only works with Android.
- You want a display that stays readable in direct sun and sips power.
Skip it if…
- • You have a small wrist (under about 160 mm) — the 46.2 mm case we list is large (check whether a smaller size is sold).
- • You want a bright, vivid AMOLED screen — this one uses a lower-power display.
Frequently asked questions
Which has better battery life, the Amazfit T-Rex 3 Pro or the Coros APEX 4 46mm?
The Amazfit T-Rex 3 Pro has the longer rated battery life: about 25 days per charge against 24 days. These are manufacturer ratings; heavy GPS, always-on display and cellular use will cut both.
Which is cheaper, the Amazfit T-Rex 3 Pro or the Coros APEX 4 46mm?
The Amazfit T-Rex 3 Pro has the lower list price: $379 against $479 in our database. List prices change often, so check Amazon for today's price.
Do the Amazfit T-Rex 3 Pro and Coros APEX 4 46mm work with iPhone and Android?
Yes, they have the same phone support: both iPhone and Android.
Which is better for swimming, the Amazfit T-Rex 3 Pro or the Coros APEX 4 46mm?
Amazfit T-Rex 3 Pro: 10ATM is suitable for swimming and surface water sports. It is not a dive rating unless the maker says so. Coros APEX 4 46mm: 5ATM is suitable for showering and pool swimming, but not for high-speed water sports or diving.
Not sure either is right for you?
Nine questions about your phone, sport, wrist and budget, scored against all of our watches with the reasoning shown.
Take the free quizWhere each one ranks #1 in our quiz
Amazfit T-Rex 3 Pro
It is not the top pick for any standard quiz profile.