Video summary

Amazfit T-Rex 3 Pro Review: 1 Month Later! Secret Features, Offline Maps, & Real Battery Life Test!

Main summary

Key takeaways

Product Review

Product reviewed

Amazfit T-Rex 3 Pro (48mm version mentioned primarily; the 44mm variant has the same software/features but some display/battery differences).

Key features mentioned

Flashlight (major standout)

  • Full LED flashlight (not screen-based).
  • 4 levels white, then switches to red.
  • Rated around 200 lux, up to 300 lux in boost mode (shows 30 seconds runtime, then cooldown).
  • Controls:
    • Hold buttons to toggle/enable boost.
    • SOS is in quick toggles (not the physical flashlight button).
  • Not customizable / not remappable.

Rugged build

  • Grade 5 titanium bezel/buttons (explicitly noted as grade five).
  • Fiber reinforced polymer back.
  • Sapphire crystal display.
  • MIL-STD 810H and 10 ATM water resistance.
  • Diving claim: certified for dives up to 45 m (no time limit specified).

Display

  • 1.5” AMOLED on the 48mm model (smaller model: 1.32”).
  • Peak brightness up to 3,000 nits.
  • Ambient light sensor / auto brightness felt well-calibrated (not overly dim).
  • Night display:
    • Red/orange/green modes
    • Available on any watch face
    • Manual or scheduled

Connectivity

  • NFC for payments in ~30 countries (details depend on region).
  • Wi‑Fi; can pair earbuds.
  • BLE for accessories (heart rate belt/power meter).
  • No LTE: calls only via phone connection over Bluetooth.

Health & fitness

  • “Biocharge” energy/energy-level monitoring (uses sleep + activity).
  • No body composition (unlike older Amazfit models like Balance 2).
  • No blood pressure and no ECG.
  • 24/7 monitoring of heart rate, SpO2, stress, and skin temperature.
  • Stress measured frequently (every 5 minutes) (not adjustable).
  • SpO2 accuracy anecdote: often near 99%, making accuracy hard to judge.
  • One-tap measurement (~45 seconds) returns blood oxygen, stress, breathing rate, plus “blood pressure” (as claimed in a video).
  • Fitness modes:
    • 187 sports modes
    • Smart recognition for 25 training exercises
    • Workout templates / interval training and virtual pacer
    • Zep Coach intensity guidance via target HR ranges
    • PI score (0–100) based on rolling 7 days

GPS & navigation (big upgrade)

  • Dual-band GPS with 6 satellite systems.
  • GPS accuracy adjustable to trade off precision vs battery.
  • True offline maps, turn-by-turn, auto rerouting, POI search (even without phone connection).
  • Supports importing routes: GPX / TCX / KML.
  • Can tap a point on the map on-wrist and navigate there.
  • Route creation tools:
    • GPX route can be made in Zep app and sent to the watch quickly.
    • Map app improved control: move/tilt/drag map by touching (rather than only using buttons like older Amazfit models).
    • “Explore nearby” POIs require GPS lock first.
  • Trouble spot in navigation feature:
    • Auto trip creation worked intermittently earlier, but stopped working after software updates (reviewer says it doesn’t work now).
    • POI access required GPS to relock when entering map app.

Smart features / phone

  • Call handling on watch: answer/end/notification off.
  • Replies supported; quick message text is Android-only (iOS doesn’t get that).
  • iOS gets camera control via watch.
  • Voice-to-text works well; emoji support and AI assistant replies.
  • Customizable vibration patterns and alert chime/volume.
  • Speaker: not very loud for music; reviewer says it’s loud enough for calls.

Music

  • Stores music on watch: 26GB / MP3 only (reviewer also mentions 28GB music capacity).

Battery (major con)

  • Battery capacity: 700 mAh.
  • Amazfit claim: up to 25 days typical, 10 days heavy.
  • Reviewer real-world result after ~1 month: about 10–12 days (sensors on, sleep tracking nightly, GPS ~2 hours/week, AOD off, Wi‑Fi off).
  • Reviewer calls it disappointing vs the “typical” marketing claim (but still good compared with many premium watches).

Ecosystem / software

  • Uses Zep app; many apps but no third-party apps on watch (only Zep app ecosystem).
  • Watch faces: lots available via Zep; can use images.
  • Mentions a Food feature: take a photo of food for nutrition estimates.

Pros (as stated or strongly implied)

  • Very bright and usable flashlight with real LED + boost mode.
  • Rugged, premium materials: grade 5 titanium + sapphire + 10 ATM + MIL-STD.
  • Excellent display brightness and legibility outdoors (3,000 nits).
  • Auto brightness perceived as well tuned.
  • Night display works on all watch faces (nice usability).
  • Smooth software performance (no stutters/hiccups reported).
  • True offline navigation + rerouting + offline POIs.
  • GPS performance: got lock even with nearby trees (in the demo).
  • Quick route creation in Zep app and fast transfer to watch.
  • Sleep/health tracking seems “realistic” to reviewer; compared fairly well with other devices.
  • Frequent stress sampling (5 min) may provide more detail.
  • Phone notifications and replies are feature-rich (AI, emojis, voice-to-text).

Cons / issues

  • Battery life underperforms Amazfit’s “typical” claim (reviewer sees 10–12 days vs expected higher).
  • Auto trip creation / navigation feature is broken after updates (no longer works for reviewer).
  • GPS lock dependency quirks: POI search requires GPS lock again when opening map app.
  • Some features not present vs other Amazfit models:
    • No golf app (mentioned as added to Balance 2 but missing here).
  • No third-party apps beyond Zep ecosystem.
  • Flashlight controls not customizable (no remapping).

Comparisons mentioned

Versus Amazfit T-Rex 3 (non-Pro)

  • Pro price is higher: $399 US vs $279 for T-Rex 3.
  • Reviewer implies the original may be enough if you don’t need the Pro upgrades.

Versus Amazfit Balance 2 / older Amazfit models

  • Body composition removed/not present on this watch (Balance had it).
  • Golf app exists on Balance 2 but is missing on T-Rex 3 Pro.

Versus previous Amazfit map controls

  • Pro’s map can be manipulated via touch dragging, avoiding older “button-only” map navigation.

User experience notes (from reviewer)

  • Overall UX is smooth, with quick access patterns (e.g., holding buttons to return home quickly).
  • Offline navigation worked well for course deviation and rerouting in their area.
  • Some navigation behaviors depend on GPS lock timing.

Unique points mentioned (complete list of distinct items)

  1. Flashlight: full LED, 4 white levels + red, ~200 lux (boost up to ~300 lux), 30-second boost runtime then cooldown.
  2. Flashlight activation via button holds; flashlight toggle and SOS via quick toggle.
  3. Flashlight not customizable/remappable.
  4. Build: fiber reinforced polymer back; grade 5 titanium bezel/buttons; bold “gold” color choice.
  5. Display protection: sapphire crystal; no screen protector needed.
  6. Rugged rating: MIL-STD 810H, 10 ATM; diving claim up to 45 m (no duration given).
  7. Navigation: improved menu return by holding back button.
  8. Screen sizes: 48mm (1.5” AMOLED) vs 44mm (1.32”) with some differences (resolution/battery).
  9. Display brightness: up to 3,000 nits; auto brightness felt correct.
  10. Night display: red/orange/green; manual or scheduled; works on any watch face.
  11. Processor not specified; reviewer reports no performance stutter.
  12. Storage: ~26GB for maps/music; MP3-only music.
  13. Band compatibility: uses quick pins; band width differs (22mm vs 20mm) so replacements must match.
  14. Pricing: $399 US (big jump from T-Rex 3 at $279).
  15. Battery: 700 mAh; claimed 25 days typical / 10 heavy; actual 10–12 days (disappointing vs typical claim).
  16. Included charger: pin dock + USB‑C port; no USB‑C cable in box (explicitly mentioned).
  17. Battery manager shows top battery-draining features; can toggle sensors (stress etc.) off and change heart rate monitoring frequency.
  18. Interface gestures: swipe down quick toggles (two pages); swipe right to apps; no tiles.
  19. Navigation apps missing: no golf app.
  20. Connectivity: NFC available in ~30 countries; Wi‑Fi supported; BLE accessories only; no LTE (calls via Bluetooth only).
  21. Health: Biocharge energy monitoring.
  22. Missing health features: no body composition, no blood pressure measurement, no ECG.
  23. Health metrics: 24-hour HR, SpO2, stress, skin temperature.
  24. “Zap app”: HR monitoring settings, alerts, sleep + stress + SpO2 on/off, frequency adjustments for HR; stress interval fixed.
  25. One-tap measurement takes ~45 seconds; returns blood pressure/stress/SpO2/breathing rate (as described).
  26. Heart rate and steps felt accurate; SpO2 near 99% often.
  27. GPS: dual-band; 6 satellite systems; accuracy adjustment to save battery.
  28. Offline navigation capabilities: true offline maps, turn-by-turn, auto rerouting, POI search offline, import routes (GPX/TCX/KML), tap-to-navigate.
  29. New navigation route tapping and routing options (straight-line vs road routing; save current location).
  30. GPX creation: can create on phone within Zep app and send to device quickly; AI names route; route preview with elevation info.
  31. Map app controls: touch-and-drag map (new vs older Amazfit controls).
  32. Explore nearby: offline POIs without phone; requires GPS lock first.
  33. Create route trip: loop route creation distance/direction controls—broken now (works earlier then fails after updates).
  34. Navigation worked well for reviewer area (but map data is third-party; performance may vary by region).
  35. Workout features: 187 sports modes; smart recognition for 25 training exercises.
  36. Strength training tracking with sets/reps/rest/weight adjustments.
  37. Auto-detect movements: 8 auto detect sports movements; pool swimming mentioned as new auto detect.
  38. Workout templates and interval training.
  39. Virtual pacer for running.
  40. Zep Coach heart-rate guidance.
  41. PI score 0–100 based on last 7 days.
  42. Sleep tracking: stages (including REM), naps, schedule, breathing quality, HRV, sleep score daily.
  43. Sleep accuracy: compared with other devices/rings; generally correlated closely; perceived more consistent than some watches.
  44. Phone: call alerts with answer/end/swipe message; quick text responses Android-only; iOS camera control.
  45. Text features: emojis, images, voice-to-text, AI assistant responses, quick replies, vibration + chime customizable.
  46. Speaker: loud enough for calls; volume adjustable; can customize alert sound/tone and vibration patterns (including custom vibration patterns).
  47. Third-party app limitation: no third-party apps; only Zep app.
  48. Watch faces: many provided through Zep (claim ~1500+ from other Amazfit products); photo watch faces supported.
  49. Zep app extra feature: Food photo nutrition estimation.
  50. Zep app sections: Biocharge, sleep, exertion/workouts, routing, device settings (music, calendar/todo, alarms, voice memos).
  51. AI assistant: Zep Flow; subscription-based Aura mentioned but not needed for most features reviewed.
  52. Zep Flow can control brightness, start workouts, and reportedly manage phone calls.
  53. Reviewer context: had several software updates, including one “this week,” to test whether earlier complaints were fixed.

Final verdict / recommendation (based on the review content)

Recommended if you want a rugged sports watch with offline maps + turn-by-turn navigation and a real LED flashlight. The core navigation/offline features and the flashlight are standout positives.

Be cautious if battery expectations are critical (reviewer gets 10–12 days, not the higher “typical” claim) or if you rely on auto trip creation, which the reviewer says is currently not working after updates.

Original video