Amazfit T-Rex Ultra 2 vs Apple Watch Ultra 4

Amazfit T-Rex Ultra 2 and Apple Watch Ultra 4 are watches both released in 2026 by different brands, with overlapping phone compatibility. This comparison separates the catalog's listed specifications from missing information and approximate values. It covers 17 fields, including 10 exact differences; it does not choose a winner.

Specifications side by side

"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

• Display: Amazfit T-Rex Ultra 2 lists AMOLED 1.5", sapphire; Apple Watch Ultra 4 lists Flat LTPO OLED, Always-On.
• Battery, as listed: Amazfit T-Rex Ultra 2 lists Up to 30 days · 50+ GPS hours; Apple Watch Ultra 4 lists Up to 50 hours · 84 hours saver. These are the full listed battery descriptions. Different modes or case variants prevent a single numeric battery-life delta.
• Operating system: Amazfit T-Rex Ultra 2 lists Zepp OS 6; Apple Watch Ultra 4 lists watchOS 27. The listed software descriptions are not a guarantee of the software version currently installed on an individual watch.
• Phone compatibility: Amazfit T-Rex Ultra 2 lists Android, iPhone; Apple Watch Ultra 4 lists iPhone.
• Cellular connection: Amazfit T-Rex Ultra 2 lists None; Apple Watch Ultra 4 lists eSIM · 5G. Variant wording is retained. A cellular specification alone does not confirm activation with your mobile carrier.
• Case material: Amazfit T-Rex Ultra 2 lists Grade-5 titanium bezel and back; Apple Watch Ultra 4 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 Ultra 2 lists None listed; Apple Watch Ultra 4 lists Apple Pay.
• Listed sensors and features: Amazfit T-Rex Ultra 2 lists HRV, Readiness score, SpO2, Skin temperature; Apple Watch Ultra 4 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 Ultra 2 lists SOS calling; Apple Watch Ultra 4 lists Crash detection, depth, Fall detection, Satellite SOS, siren, SOS calling.
• Hardware flashlight: Amazfit T-Rex Ultra 2 lists Yes; Apple Watch Ultra 4 lists No.

Where they are the same

• Both list release year: 2026.
• 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 Ultra 2 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 4 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.

Information is missing on at least one side for: Brightness. Those rows are excluded from the exact difference count.

Related pages

• Amazfit T-Rex Ultra 2 specifications
• Amazfit watches
• Apple Watch Ultra 4 specifications
• Apple watches
• Amazfit Balance vs Amazfit Balance 2
• Amazfit Balance 2 vs Amazfit Balance 3
• Amazfit Bip 5 vs Amazfit Bip 6
• Amazfit Active vs Amazfit Active 2 (Round)
• Amazfit Active 2 (Round) vs Amazfit Active 3 Premium
• Amazfit GTS (1st gen) vs Amazfit GTS 2
• All pair comparisons