Amazfit T-Rex Ultra 2 smartwatchRugged outdoor~$550

Amazfit

Amazfit T-Rex Ultra 2

Android; iPhone with limitsPaid tier: Zepp Aura

Amazfit's expedition model uses a 51 mm titanium-trimmed case, an 870 mAh battery and 64GB of storage. Its maker rates it at 30 days of typical use, 50 hours of dual-band GPS and 177 hours in GPS Max mode, plus 40 hours with GPS in Low Temperature Mode. It is certified for freediving and recreational scuba to 45 m, and its flashlight has green and white light.

Approx. price

~$550

maker's list price, not a live price

Battery, smartwatch mode

30 days

the maker's headline

Battery, always-on display

10 days

33% of the headline

Battery, GPS workout

50 h

maker's figure

Works with

Android; iPhone with limits

see the limits below

Weight

89.2 g

with strap

Best for: Multi-day backpackers, divers and cold-weather users who want the longest-running T-Rex without solar.

Battery: the claim and the other two figures

Claimed (smartwatch mode)
30 days
With always-on display
10 days
GPS workout
50 h
  • Headline: Amazfit: "Typical Use Battery Life: Up to 30 days" (heavy use up to 15 days).
  • Always-on: Amazfit: "AOD Mode: Up to 10 days".
  • GPS: Amazfit: "Accurate GPS Mode: Up to 50 hours" (dual-frequency, all satellites); no standard single-band figure published.
  • Dual-band GPS: 50 h.
  • Amazfit: Power-Saving GPS (single frequency) up to 90 hours, GPS Max Battery Life 177 hours, Low Temperature Mode up to 40 hours with GPS.

The ring’s outer track is the headline claim; the inner two are the always-on and GPS figures as a share of it. An empty track means Amazfit does not publish that figure. Why the figures differ

Phones, paid tier and updates

iPhone:
Yes, with limits.
Android:
Yes.
Amazfit lists Call Quick Reply as Android only, so iPhone owners cannot send quick replies from the watch; phone camera control is iOS only.
Paid tier:
Zepp Aura, $69.99/year.
No watch feature requires it; Amazfit sells workout and recovery data in the Zepp App with no subscription. Zepp Aura adds unlimited AI sleep-assistant chats (free users get one message a day), detailed weekly and monthly sleep reports, and the full sleep and meditation music library.
Watch plus two years of Zepp Aura: ~$690.
Software updates:
Amazfit does not publish a guaranteed number of update years for this model.

Cleared health features

Amazfit cites no regulator clearance for a health feature on this model. Its heart-rate, sleep and blood-oxygen readings are wellness features.

A clearance says what a feature is allowed to claim, not that it replaces a doctor. Cleared versus wellness features

What the extra money buys: Against the Amazfit T-Rex 3 Pro, the extra ~$150 buys 24 h more GPS time and a longer headline battery (30 days vs 17 days). See the Amazfit T-Rex 3 Pro.

Specifications

Approx. price
~$550 (Black Magma, $549.99 on us.amazfit.com)
Type
Rugged outdoor
Platform
Zepp OS
Case sizes
51 mm
Weight
51 mm: 89.2 g (with strap)
Battery, smartwatch mode
30 days (Amazfit: "Typical Use Battery Life: Up to 30 days" (heavy use up to 15 days))
Battery, always-on display
10 days (Amazfit: "AOD Mode: Up to 10 days")
Always-on keeps
33% of the headline figure
Battery, GPS workout
50 h (Amazfit: "Accurate GPS Mode: Up to 50 hours" (dual-frequency, all satellites); no standard single-band figure published)
Battery, dual-band GPS
50 h
Battery note
Amazfit: Power-Saving GPS (single frequency) up to 90 hours, GPS Max Battery Life 177 hours, Low Temperature Mode up to 40 hours with GPS.
Works with
Android; iPhone with limits
iPhone
Yes, with limits
Android
Yes
Phone limits
Amazfit lists Call Quick Reply as Android only, so iPhone owners cannot send quick replies from the watch; phone camera control is iOS only.
Paid tier
Zepp Aura, $69.99/year
What the paid tier gates
No watch feature requires it; Amazfit sells workout and recovery data in the Zepp App with no subscription. Zepp Aura adds unlimited AI sleep-assistant chats (free users get one message a day), detailed weekly and monthly sleep reports, and the full sleep and meditation music library.
Update years
Not published by the maker
Cleared health features
None the maker cites
Display
AMOLED
Always-on display
Yes
Dual-band GPS
Yes
Maps
Full topo maps on the watch (Amazfit: "Preloaded Base Maps, Downloadable Contour Maps & Ski Resort Maps, Turn-by-Turn Navigation, POI Search, Route Planning, Auto Rerouting"; 64GB storage)
Music on the watch
Yes
LTE
No LTE version
Contactless pay
No
Flashlight
Yes
Water rating
10 ATM
Case
fiber-reinforced polymer case, grade 5 titanium bezel, buttons and back
Released
2026

Features, per Amazfit

  • 51 mm case with grade 5 titanium bezel, buttons and back
  • 1.5-inch AMOLED, up to 3,000 nits, sapphire glass
  • 870 mAh battery
  • Dual-band GPS across 6 satellite systems
  • Preloaded base maps, downloadable contour and ski maps; 64GB storage
  • Freediving and recreational scuba to 45 m
  • Low Temperature Mode

Where the specs put it ahead

  • 177 hours in GPS Max mode covers a week-long trek without charging
  • Ten days even with always-on display enabled
  • Dive-certified to 45 m for freediving and recreational scuba
  • Low Temperature Mode keeps 40 hours of GPS in the cold
  • Preloaded maps plus contour downloads and 64GB of storage

What it gives up

  • 89.2 g with strap is heavy for sleep tracking
  • 51 mm case only; no smaller size
  • Contour maps must be downloaded; only base maps are preloaded

The two lists above are drawn from the maker’s own pages and prices, not from owner reports. Where owner discussion has been read it appears in its own section below, so the two are never mistaken for each other.

What owners say

No owner discussion has been read for the Amazfit T-Rex Ultra 2 yet. This section stays empty until there is something real to put in it.

Others in the same part of the catalog

Amazfit T-Rex 3 Pro smartwatch
Amazfit~$400

Amazfit T-Rex 3 Pro

Rugged outdoor · Zepp OS

Android; iPhone with limitsPaid tier: Zepp Aura
smartwatch mode
17 days
always-on display
not published
GPS workout
26 h
  • Two case sizes
  • Preloaded maps
  • Flashlight

Best for: Hikers and divers who want a rugged mapping watch, including a 44 mm size for smaller wrists.

More from Amazfit →

← Back to the catalog