Amazfit T-Rex 3 Pro vs COROS Apex 4
Amazfit T-Rex 3 Pro and COROS Apex 4 are watches both released in 2025 by different brands, with overlapping phone compatibility. This comparison separates the catalog's listed specifications from missing information and approximate values. It covers 18 fields, including 8 exact differences; it does not choose a winner.
Specifications side by side
| Field | Amazfit T-Rex 3 Pro | COROS Apex 4 |
|---|---|---|
| Release year | 2025 | 2025 |
| Case sizes | 48 mm | 42 / 46 mm |
| Display | AMOLED, sapphire glass | MIP (sun-readable) |
| Brightness | 3000 nits | Not listed |
| Battery, as listed | 25 days (approx.) | Up to 65 GPS hours (46 mm) (approx.) |
| Operating system | Zepp OS | COROS OS |
| Phone compatibility | Android, iPhone | Android, iPhone |
| Cellular connection | None | None |
| Water rating | 10ATM | 5ATM |
| Glass | Sapphire | Sapphire |
| Case material | Titanium | Grade-5 titanium |
| GPS | Dual-frequency GNSS | Dual-frequency GNSS |
| Maps | Yes | Yes |
| Payment system | None listed | None listed |
| Plan requirement | Not required | Not required |
| Listed sensors and features | HRV, Readiness score, SpO2, Skin temperature | HRV, Readiness score, SpO2 |
| Safety features | SOS calling | None listed |
| Hardware flashlight | Yes | No |
"Not listed" means the catalog has no usable value for that field. It does not mean the watch lacks the feature. Approximate values stay visible but do not support the difference count or numeric deltas.
Where they differ
- Case sizes: Amazfit T-Rex 3 Pro lists 48 mm; COROS Apex 4 lists 42 / 46 mm. Keep the variant qualifications when comparing an individual model; this row describes the catalog entry rather than every configuration.
- Display: Amazfit T-Rex 3 Pro lists AMOLED, sapphire glass; COROS Apex 4 lists MIP (sun-readable).
- Operating system: Amazfit T-Rex 3 Pro lists Zepp OS; COROS Apex 4 lists COROS OS. The listed software descriptions are not a guarantee of the software version currently installed on an individual watch.
- Water rating: Amazfit T-Rex 3 Pro lists 10ATM; COROS Apex 4 lists 5ATM.
- Case material: Amazfit T-Rex 3 Pro lists Titanium; COROS Apex 4 lists Grade-5 titanium. Keep the variant qualifications when comparing an individual model; this row describes the catalog entry rather than every configuration.
- Listed sensors and features: Amazfit T-Rex 3 Pro lists HRV, Readiness score, SpO2, Skin temperature; COROS Apex 4 lists HRV, Readiness score, SpO2. This compares the listed feature names, not measurement accuracy, clinical usefulness or availability in a particular country.
- Safety features: Amazfit T-Rex 3 Pro lists SOS calling; COROS Apex 4 lists None listed.
- Hardware flashlight: Amazfit T-Rex 3 Pro lists Yes; COROS Apex 4 lists No.
Where they are the same
- Both list release year: 2025.
- Both list phone compatibility: Android, iPhone.
- Both list cellular connection: None.
- Both list glass: Sapphire.
- Both list gps: Dual-frequency GNSS.
- Both list maps: Yes.
- Both list payment system: None listed.
- Both list plan requirement: Not required.
Which one fits you
Amazfit T-Rex 3 Pro is listed as a watch compatible with Android, iPhone. Start with that phone requirement before comparing the other rows. The exact differences above are a way to identify which listed specifications matter to your use, not evidence that one model is better in every respect.
COROS Apex 4 is listed as a watch compatible with Android, iPhone. Start with that phone requirement before comparing the other rows. The exact differences above are a way to identify which listed specifications matter to your use, not evidence that one model is better in every respect.
Information is missing on at least one side for: Brightness. Those rows are excluded from the exact difference count.
Related pages
- Amazfit T-Rex 3 Pro specifications
- Amazfit watches
- COROS Apex 4 specifications
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