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2026 comparison
Updated Jan 7, 2026
|Sources: Amazon, ManufacturerGarmin epix Pro (Gen 2) Sapphire Edition (47mm) vs Amazfit T-Rex 3
If you're after a high-end smartwatch, the Garmin epix Pro (Gen 2) Sapphire Edition (47mm) stands out with its premium build and advanced features. However, the Amazfit T-Rex 3 surprises with its incredible battery life and bright display. In real-world usage, the Garmin's 16-day battery life is impressive, but the T-Rex 3 lasts up to 27 days, making it a no-brainer for users who prioritize longevity. Plus, the larger 1.5" AMOLED screen on the Amazfit is a game-changer when outdoors, with peak brightness of 2000 nits versus the Garmin's 1.3" at a lower brightness.
⚖️ Weight: 2.47 oz vs 2.41 oz🔋 Battery: 16 days vs 27 days📱 Display: 1.3" vs 1.5"
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Garmin epix Pro (Gen 2) Sapphire Edition (47mm)
★4.7
(1,201)•Amazon
Compatibility:iPhone, Android (Garmin Connect app required)
Operating System:Garmin OS (Proprietary)
Case Size:47 x 47 x 14.5 mm
Case Material:Fiber-reinforced polymer with titanium rear cover; Titanium bezel; Sapphire Crystal lens
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Amazfit T-Rex 3
★4.5
(1,926)•Amazon
Compatibility:Android 7.0 or later; iOS 14.0 or later (Zepp App required)
Operating System:Zepp OS 4
Case Size:48.5mm x 48.5mm x 13.75mm
Case Material:Polymer middle frame; Stainless steel bezel (316L)
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Key spec differences
Only the specs that differ are shown here. Winners are highlighted when the data is clear.
Winner= clear advantage
Spec
Garmin epix Pro (Gen 2) Sapphire Edition (47mm)
Amazfit T-Rex 3
Display2 specs
Display SizeKey
Garmin epix Pro (Gen 2) Sapphire Edition (47mm)
1.3 in (33.0 mm) diameter
Amazfit T-Rex 3
1.5 in (38.1 mm) diameter
Resolution
Garmin epix Pro (Gen 2) Sapphire Edition (47mm)
416 x 416 pixels
Amazfit T-Rex 3
480 x 480 pixels (322 ppi)
Performance1 specs
Storage
Garmin epix Pro (Gen 2) Sapphire Edition (47mm)
32GB
Amazfit T-Rex 3
32GB (Approx. 26GB user-accessible for Music/Maps)
Battery1 specs
Battery CapacityKey
Garmin epix Pro (Gen 2) Sapphire Edition (47mm)
Smartwatch mode: Up to 16 days (6 days always-on); GPS Only: Up to 42 hours (30 hours always-on); Expedition GPS: Up to 14 days
Amazfit T-Rex 3
700 mAh; Up to 27 days (Typical usage); Up to 13 days (Heavy usage); Up to 42 hours (Accuracy GPS mode); Up to 114 hours (GPS Long Battery Life)
Design2 specs
Weight
Garmin epix Pro (Gen 2) Sapphire Edition (47mm)
70 g (Case only: 47 g) — Titanium model
Amazfit T-Rex 3
68.3 g (without strap)Winner
Water Resistance
Garmin epix Pro (Gen 2) Sapphire Edition (47mm)
10 ATM (water pressure equivalent to 100 meters)
Amazfit T-Rex 3
10 ATM (100 meters); Freediving certified (EN13319) to 45m
Software1 specs
Operating System
Garmin epix Pro (Gen 2) Sapphire Edition (47mm)
Garmin OS (Proprietary)
Amazfit T-Rex 3
Zepp OS 4
Connectivity1 specs
Connectivity
Garmin epix Pro (Gen 2) Sapphire Edition (47mm)
Bluetooth; ANT+; Wi-Fi
Amazfit T-Rex 3
Wi-Fi (2.4GHz); Bluetooth 5.2; BLE
+Full specs, pros, and cons
Everything side-by-side with ratings and the full spec list.
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Full specs, pros, and cons
Everything side-by-side with ratings and the full spec list.
Comparison: Garmin epix Pro (Gen 2) Sapphire Edition (47mm) vs Amazfit T-Rex 3
Garmin epix Pro (Gen 2) Sapphire Edition (47mm)
★4.7(1,201)Amazon
Amazfit T-Rex 3
★4.5(1,926)Amazon
| Criterion | Garmin epix Pro (Gen 2) Sapphire Edition (47mm) | Amazfit T-Rex 3 |
|---|---|---|
| Rating | ★4.7(1,201)Amazon | ★4.5(1,926)Amazon |
Compatibility | iPhone, Android (Garmin Connect app required) | Android 7.0 or later; iOS 14.0 or later (Zepp App required) |
Operating System | Garmin OS (Proprietary) | Zepp OS 4 |
Case Size | 47 x 47 x 14.5 mm | 48.5mm x 48.5mm x 13.75mm |
Case Material | Fiber-reinforced polymer with titanium rear cover; Titanium bezel; Sapphire Crystal lens | Polymer middle frame; Stainless steel bezel (316L) |
Display Type | AMOLED; Always-On Mode available | AMOLED; Gorilla Glass; Peak brightness 2000 nits |
Display Size | 1.3 in (33.0 mm) diameter | 1.5 in (38.1 mm) diameter |
Resolution | 416 x 416 pixels | 480 x 480 pixels (322 ppi) |
Always On Display | Yes (optional) | Yes |
Water Resistance | 10 ATM (water pressure equivalent to 100 meters) | 10 ATM (100 meters); Freediving certified (EN13319) to 45m |
Durability | MIL-STD-810H (Thermal, Shock, Water); Scratch-resistant Sapphire lens | MIL-STD-810H (70°C heat / -30°C cold / Shock / Humidity); Mud-resistant bridge and buttons |
GPS | Multi-band GNSS with SatIQ technology; GPS, GLONASS, Galileo | Dual-band GNSS (L1+L5); 6 Satellite Positioning Systems (GPS, GLONASS, Galileo, BeiDou, QZSS, NAVIC) |
Connectivity | Bluetooth; ANT+; Wi-Fi | Wi-Fi (2.4GHz); Bluetooth 5.2; BLE |
NFC Payments | Garmin Pay | Zepp Pay (Europe/parts of Asia only); Not supported on US models |
Sensors | Elevate Gen 5 optical heart rate sensor; Pulse Ox blood oxygen saturation monitor; Barometric altimeter; Compass; Gyroscope; Accelerometer; Thermometer; Ambient light sensor | BioTracker™ 6.0 PPG biometric sensor (SpO2, Heart Rate); Accelerometer; Gyroscope; Geomagnetic sensor; Barometric altimeter; Ambient light sensor; Temperature sensor (skin/water) |
Health Features | ECG App (FDA cleared); Hill Score; Endurance Score; Jet Lag Adviser; Body Battery; Sleep Score; HRV Status; Health Snapshot; Pulse Ox | Readiness Score; HRV (Heart Rate Variability); Sleep Breathing Quality; One-tap measuring (HR, SpO2, Stress, Breathing rate); Sleep stages (REM/Deep/Light); PAI Health Assessment |
Workout Modes | Advanced Strength Training; HIIT; Running (Track, Trail, Ultra); Cycling (MTB, eBike); Skiing/Snowboarding; Surfing; Golf (43,000+ courses); Soccer; Tennis; and 80+ others | Hyrox Race mode; Ultramarathon; Freediving; Strength Training (auto-detection of 25 movements); Triathlon; Skiing; Snowboarding; Surf; and 170+ others |
Storage | 32GB | 32GB (Approx. 26GB user-accessible for Music/Maps) |
Speaker Mic | None (Audio prompts via connected Bluetooth headphones only) | Microphone (for Zepp Flow voice commands); No Speaker (Buzzer/Beeper only for alerts) |
Calls | No (Can accept/decline calls to control phone; Android users can send text replies) | No (Cannot answer calls on wrist; can reject/ignore calls) |
Battery | Smartwatch mode: Up to 16 days (6 days always-on); GPS Only: Up to 42 hours (30 hours always-on); Expedition GPS: Up to 14 days | 700 mAh; Up to 27 days (Typical usage); Up to 13 days (Heavy usage); Up to 42 hours (Accuracy GPS mode); Up to 114 hours (GPS Long Battery Life) |
Charging | Garmin proprietary plug charger (clip-on data cable) | Magnetic charging base (2-pin); Approx. 3 hours to full charge |
Weight | 70 g (Case only: 47 g) — Titanium model | 68.3 g (without strap) |
Band Sizes | Fits wrists 125–208mm (Silicone band included); QuickFit 22mm compatible | 22mm width; Fits 145–210mm wrists (Proprietary screws but includes adapters for standard bands in some regions) |
Extras | Built-in LED Flashlight (Red/White strobes); Red Shift Mode (preserves night vision); Outdoor Maps+; Real-time Stamina; Morning Report | Offline Maps (Contour/Terrain); Turn-by-turn navigation; Zepp Flow (AI voice assistant); Night Display mode; Glove mode |
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Garmin epix Pro (Gen 2) Sapphire Edition (47mm)
Rating:★4.7(1,201)Amazon
Compatibility:iPhone, Android (Garmin Connect app required)
Operating System:Garmin OS (Proprietary)
Case Size:47 x 47 x 14.5 mm
Case Material:Fiber-reinforced polymer with titanium rear cover; Titanium bezel; Sapphire Crystal lens
Display Type:AMOLED; Always-On Mode available
Display Size:1.3 in (33.0 mm) diameter
Resolution:416 x 416 pixels
Always On Display:Yes (optional)
Water Resistance:10 ATM (water pressure equivalent to 100 meters)
Durability:MIL-STD-810H (Thermal, Shock, Water); Scratch-resistant Sapphire lens
GPS:Multi-band GNSS with SatIQ technology; GPS, GLONASS, Galileo
Connectivity:Bluetooth; ANT+; Wi-Fi
NFC Payments:Garmin Pay
Sensors:Elevate Gen 5 optical heart rate sensor; Pulse Ox blood oxygen saturation monitor; Barometric altimeter; Compass; Gyroscope; Accelerometer; Thermometer; Ambient light sensor
Health Features:ECG App (FDA cleared); Hill Score; Endurance Score; Jet Lag Adviser; Body Battery; Sleep Score; HRV Status; Health Snapshot; Pulse Ox
Workout Modes:Advanced Strength Training; HIIT; Running (Track, Trail, Ultra); Cycling (MTB, eBike); Skiing/Snowboarding; Surfing; Golf (43,000+ courses); Soccer; Tennis; and 80+ others
Storage:32GB
Speaker Mic:None (Audio prompts via connected Bluetooth headphones only)
Calls:No (Can accept/decline calls to control phone; Android users can send text replies)
Battery:Smartwatch mode: Up to 16 days (6 days always-on); GPS Only: Up to 42 hours (30 hours always-on); Expedition GPS: Up to 14 days
Charging:Garmin proprietary plug charger (clip-on data cable)
Weight:70 g (Case only: 47 g) — Titanium model
Band Sizes:Fits wrists 125–208mm (Silicone band included); QuickFit 22mm compatible
Extras:Built-in LED Flashlight (Red/White strobes); Red Shift Mode (preserves night vision); Outdoor Maps+; Real-time Stamina; Morning Report
✓ Pros:
- • Premium Sapphire and Titanium build is lightweight yet durable
- • Built-in LED flashlight is incredibly useful for night training
- • Elevate Gen 5 sensor enables ECG and improved tracking accuracy
- • Excellent battery life (16 days) despite the bright AMOLED screen
- • Multi-band GPS with SatIQ offers top-tier location precision
✗ Cons:
- • Lacks the microphone and speaker found in the newer Fenix 8
- • No LTE/Cellular option (phone required for data/safety features)
- • Significant price premium over standard non-Sapphire models
- • Proprietary charging cable is less convenient than wireless options
As an Amazon Associate I earn from qualifying purchases.
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Amazfit T-Rex 3
Rating:★4.5(1,926)Amazon
Compatibility:Android 7.0 or later; iOS 14.0 or later (Zepp App required)
Operating System:Zepp OS 4
Case Size:48.5mm x 48.5mm x 13.75mm
Case Material:Polymer middle frame; Stainless steel bezel (316L)
Display Type:AMOLED; Gorilla Glass; Peak brightness 2000 nits
Display Size:1.5 in (38.1 mm) diameter
Resolution:480 x 480 pixels (322 ppi)
Always On Display:Yes
Water Resistance:10 ATM (100 meters); Freediving certified (EN13319) to 45m
Durability:MIL-STD-810H (70°C heat / -30°C cold / Shock / Humidity); Mud-resistant bridge and buttons
GPS:Dual-band GNSS (L1+L5); 6 Satellite Positioning Systems (GPS, GLONASS, Galileo, BeiDou, QZSS, NAVIC)
Connectivity:Wi-Fi (2.4GHz); Bluetooth 5.2; BLE
NFC Payments:Zepp Pay (Europe/parts of Asia only); Not supported on US models
Sensors:BioTracker™ 6.0 PPG biometric sensor (SpO2, Heart Rate); Accelerometer; Gyroscope; Geomagnetic sensor; Barometric altimeter; Ambient light sensor; Temperature sensor (skin/water)
Health Features:Readiness Score; HRV (Heart Rate Variability); Sleep Breathing Quality; One-tap measuring (HR, SpO2, Stress, Breathing rate); Sleep stages (REM/Deep/Light); PAI Health Assessment
Workout Modes:Hyrox Race mode; Ultramarathon; Freediving; Strength Training (auto-detection of 25 movements); Triathlon; Skiing; Snowboarding; Surf; and 170+ others
Storage:32GB (Approx. 26GB user-accessible for Music/Maps)
Speaker Mic:Microphone (for Zepp Flow voice commands); No Speaker (Buzzer/Beeper only for alerts)
Calls:No (Cannot answer calls on wrist; can reject/ignore calls)
Battery:700 mAh; Up to 27 days (Typical usage); Up to 13 days (Heavy usage); Up to 42 hours (Accuracy GPS mode); Up to 114 hours (GPS Long Battery Life)
Charging:Magnetic charging base (2-pin); Approx. 3 hours to full charge
Weight:68.3 g (without strap)
Band Sizes:22mm width; Fits 145–210mm wrists (Proprietary screws but includes adapters for standard bands in some regions)
Extras:Offline Maps (Contour/Terrain); Turn-by-turn navigation; Zepp Flow (AI voice assistant); Night Display mode; Glove mode
✓ Pros:
- • Incredible 27-day battery life crushes the competition
- • Large, bright 1.5" AMOLED (2000 nits) is easy to read outdoors
- • Free offline contour maps with turn-by-turn navigation
- • Freediving certified to 45m (rare at this price point)
- • Generous 32GB storage for offline music and global maps
✗ Cons:
- • No built-in speaker (alerts are beeps/vibrations only)
- • NFC payments (Zepp Pay) are not supported on US hardware
- • Large 48.5mm case is bulky for smaller wrists
- • Proprietary strap system requires adapters to use standard bands
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Which one is better?
The Amazfit T-Rex 3 is the better buy for most people - its staggering 27-day battery life crushes the Garmin epix Pro (Gen 2) Sapphire Edition (47mm).
Who should buy each?
Choose the Garmin epix Pro (Gen 2) Sapphire Edition (47mm) if: you value a premium build with similar-weight titanium, need a built-in flashlight for night activities, or want advanced health metrics like ECG. (2.47 oz weight)
Choose the Amazfit T-Rex 3 if: you want a smartwatch with an outstanding 27-day battery life, prefer a larger display for easier outdoor visibility, or need a more budget-friendly option.
Conclusion
We hope this comparison helps you buy with confidence. Both products are dependable; the right one depends on how you will use it.
Frequently Asked Questions
+Which has better value?
Garmin epix Pro (Gen 2) Sapphire Edition (47mm) excels if you value premium sapphire and titanium build is lightweight yet durable. Amazfit T-Rex 3 is better if you prioritize incredible 27-day battery life crushes the competition. Pick based on your budget and daily use.
+Is this an independent review?
Yes. We use affiliate links for monetization, but recommendations are research-driven and unbiased.
+Do newer models exist?
Check release timelines from the manufacturers and compare pricing before you buy. We refresh this page when major updates land.
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