Amazfit T-Rex 3 Pro vs Apple Watch Ultra 3
Amazfit T-Rex 3 Pro and Apple Watch Ultra 3 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 10 exact differences; it does not choose a winner.
Specifications side by side
| Field | Amazfit T-Rex 3 Pro | Apple Watch Ultra 3 |
|---|---|---|
| Release year | 2025 | 2025 |
| Case sizes | 48 mm | 49 mm |
| Display | AMOLED, sapphire glass | Wide-angle LTPO3 OLED, Always-On |
| Brightness | 3000 nits | 3000 nits |
| Battery, as listed | 25 days (approx.) | Up to 42 hours · 72 hours saver |
| Operating system | Zepp OS | watchOS 26 (upgradable to 27) |
| Phone compatibility | Android, iPhone | iPhone |
| Cellular connection | None | eSIM · 5G |
| Water rating | 10ATM | 10ATM · EN13319 (diving) |
| Glass | Sapphire | Sapphire |
| Case material | Titanium | Titanium (natural/black) |
| GPS | Dual-frequency GNSS | Dual-frequency GNSS |
| Maps | Yes | Yes |
| Payment system | None listed | Apple Pay |
| Plan requirement | Not required | Not required |
| Listed sensors and features | HRV, Readiness score, SpO2, Skin temperature | Sleep apnea, ECG, HRV, Readiness score, SpO2, Skin temperature |
| Safety features | SOS calling | Crash detection, depth, Fall detection, Satellite SOS, siren, SOS calling |
| 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; Apple Watch Ultra 3 lists 49 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; Apple Watch Ultra 3 lists Wide-angle LTPO3 OLED, Always-On.
- Operating system: Amazfit T-Rex 3 Pro lists Zepp OS; Apple Watch Ultra 3 lists watchOS 26 (upgradable to 27). The listed software descriptions are not a guarantee of the software version currently installed on an individual watch.
- Phone compatibility: Amazfit T-Rex 3 Pro lists Android, iPhone; Apple Watch Ultra 3 lists iPhone.
- Cellular connection: Amazfit T-Rex 3 Pro lists None; Apple Watch Ultra 3 lists eSIM · 5G. Variant wording is retained. A cellular specification alone does not confirm activation with your mobile carrier.
- Case material: Amazfit T-Rex 3 Pro lists Titanium; Apple Watch Ultra 3 lists Titanium (natural/black). Keep the variant qualifications when comparing an individual model; this row describes the catalog entry rather than every configuration.
- Payment system: Amazfit T-Rex 3 Pro lists None listed; Apple Watch Ultra 3 lists Apple Pay.
- Listed sensors and features: Amazfit T-Rex 3 Pro lists HRV, Readiness score, SpO2, Skin temperature; Apple Watch Ultra 3 lists Sleep apnea, ECG, HRV, Readiness score, SpO2, Skin temperature. 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; Apple Watch Ultra 3 lists Crash detection, depth, Fall detection, Satellite SOS, siren, SOS calling.
- Hardware flashlight: Amazfit T-Rex 3 Pro lists Yes; Apple Watch Ultra 3 lists No.
Where they are the same
- Both list release year: 2025.
- Both list brightness: 3000 nits.
- Both list glass: Sapphire.
- Both list gps: Dual-frequency GNSS.
- Both list maps: Yes.
- 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.
Apple Watch Ultra 3 is listed as a watch compatible with 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.
Related pages
- Amazfit T-Rex 3 Pro specifications
- Amazfit watches
- Apple Watch Ultra 3 specifications
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