← Back to Smartwatches
2026 comparison
Updated Jan 7, 2026
|Sources: Amazon, ManufacturerAmazfit T-Rex 3 vs Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
The Amazfit T-Rex 3 is the better buy for most people - its incredible 27-day battery life crushes the Samsung Galaxy Watch6 Classic's 40-hour capability. In real-world use, that means you can go weeks without charging, making it ideal for outdoor activities or travel. If seamless health tracking features and a premium look are your priorities, the Galaxy Watch6 Classic offers a stunning display and advanced monitoring capabilities like FDA-cleared ECG. This could be a game changer if you’re focused on comprehensive health insights and smartphone integration with Samsung devices.
⚖️ Weight: 2.41 oz vs 2.08 oz💽 Storage: 32 GB vs 16 GB📱 Display: 1.5" AMOLED (2000 nits) vs 1.5" Super AMOLED
As an Amazon Associate I earn from qualifying purchases.
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)
Check Amazon Price→
Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
★3.9
(565)•Amazon
Compatibility:Android 10.0 or higher with 1.5GB+ RAM (iOS NOT supported; some health features like ECG require a Samsung Galaxy phone)
Operating System:Wear OS 4 (Powered by Samsung, One UI 5 Watch)
Case Size:47mm (46.5 x 46.5 x 10.9 mm / 1.83 x 1.83 x 0.43 in)
Case Material:Case: Stainless Steel; Glass: Sapphire Crystal; Strap: Hybrid Eco-Leather (standard US retail)
Check Amazon Price→
Key spec differences
Only the specs that differ are shown here. Winners are highlighted when the data is clear.
Winner= clear advantage
Spec
Amazfit T-Rex 3
Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
Display2 specs
Display SizeKey
Amazfit T-Rex 3
1.5 in (38.1 mm) diameter
Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
1.5 in (37.3 mm)
Resolution
Amazfit T-Rex 3
480 x 480 pixels (322 ppi)
Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
480 x 480 pixels
Performance1 specs
Storage
Amazfit T-Rex 3
32GB (Approx. 26GB user-accessible for Music/Maps)Winner
Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
16 GB (Internal) / 2 GB RAM
Battery1 specs
Battery CapacityKey
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)
Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
425 mAh; Up to 40 hours (AOD Off); Up to 30 hours (AOD On)
Design2 specs
Weight
Amazfit T-Rex 3
68.3 g (without strap)
Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
59.0 g / 2.08 oz (Case weight only)Winner
Water Resistance
Amazfit T-Rex 3
10 ATM (100 meters); Freediving certified (EN13319) to 45m
Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
5 ATM + IP68 (Water resistant up to 50 meters)
Software1 specs
Operating System
Amazfit T-Rex 3
Zepp OS 4
Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
Wear OS 4 (Powered by Samsung, One UI 5 Watch)
Connectivity1 specs
Connectivity
Amazfit T-Rex 3
Wi-Fi (2.4GHz); Bluetooth 5.2; BLE
Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
Bluetooth 5.3; Wi-Fi 2.4+5GHz (802.11 a/b/g/n); NFC
+Full specs, pros, and cons
Everything side-by-side with ratings and the full spec list.
Expand
Full specs, pros, and cons
Everything side-by-side with ratings and the full spec list.
Comparison: Amazfit T-Rex 3 vs Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
Amazfit T-Rex 3
★4.5(1,926)Amazon
Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
★3.9(565)Amazon
| Criterion | Amazfit T-Rex 3 | Samsung Galaxy Watch6 Classic (47mm, Bluetooth) |
|---|---|---|
| Rating | ★4.5(1,926)Amazon | ★3.9(565)Amazon |
Compatibility | Android 7.0 or later; iOS 14.0 or later (Zepp App required) | Android 10.0 or higher with 1.5GB+ RAM (iOS NOT supported; some health features like ECG require a Samsung Galaxy phone) |
Operating System | Zepp OS 4 | Wear OS 4 (Powered by Samsung, One UI 5 Watch) |
Case Size | 48.5mm x 48.5mm x 13.75mm | 47mm (46.5 x 46.5 x 10.9 mm / 1.83 x 1.83 x 0.43 in) |
Case Material | Polymer middle frame; Stainless steel bezel (316L) | Case: Stainless Steel; Glass: Sapphire Crystal; Strap: Hybrid Eco-Leather (standard US retail) |
Display Type | AMOLED; Gorilla Glass; Peak brightness 2000 nits | Super AMOLED touchscreen (Always-On capable) |
Display Size | 1.5 in (38.1 mm) diameter | 1.5 in (37.3 mm) |
Resolution | 480 x 480 pixels (322 ppi) | 480 x 480 pixels |
Always On Display | Yes | Yes |
Water Resistance | 10 ATM (100 meters); Freediving certified (EN13319) to 45m | 5 ATM + IP68 (Water resistant up to 50 meters) |
Durability | MIL-STD-810H (70°C heat / -30°C cold / Shock / Humidity); Mud-resistant bridge and buttons | MIL-STD-810H compliant (Environmental engineering considerations and laboratory tests) |
GPS | Dual-band GNSS (L1+L5); 6 Satellite Positioning Systems (GPS, GLONASS, Galileo, BeiDou, QZSS, NAVIC) | GPS, GLONASS, Galileo, BeiDou |
Connectivity | Wi-Fi (2.4GHz); Bluetooth 5.2; BLE | Bluetooth 5.3; Wi-Fi 2.4+5GHz (802.11 a/b/g/n); NFC |
NFC Payments | Zepp Pay (Europe/parts of Asia only); Not supported on US models | Yes (Samsung Wallet, Google Wallet) |
Sensors | BioTracker™ 6.0 PPG biometric sensor (SpO2, Heart Rate); Accelerometer; Gyroscope; Geomagnetic sensor; Barometric altimeter; Ambient light sensor; Temperature sensor (skin/water) | Samsung BioActive Sensor (Optical Heart Rate + Electrical Heart + Bioelectrical Impedance Analysis); Temperature Sensor; Accelerometer; Barometer; Gyro Sensor; Geomagnetic Sensor; Light Sensor; 3D Hall Sensor |
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 | Body Composition (BIA); ECG (AFib detection); Sleep Coaching & Analysis; Blood Oxygen (SpO2); Cycle Tracking (Skin Temperature); Irregular Heart Rhythm Notification |
Workout Modes | Hyrox Race mode; Ultramarathon; Freediving; Strength Training (auto-detection of 25 movements); Triathlon; Skiing; Snowboarding; Surf; and 170+ others | 90+ exercises; Automatic workout detection (Walking, Running, Cycling, Rowing, Elliptical, Dynamic High-Intensity, Swimming); Personalized Heart Rate Zones |
Storage | 32GB (Approx. 26GB user-accessible for Music/Maps) | 16 GB (Internal) / 2 GB RAM |
Speaker Mic | Microphone (for Zepp Flow voice commands); No Speaker (Buzzer/Beeper only for alerts) | Yes (Built-in speaker and microphone) |
Calls | No (Cannot answer calls on wrist; can reject/ignore calls) | Yes (Make and answer calls via Bluetooth) |
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) | 425 mAh; Up to 40 hours (AOD Off); Up to 30 hours (AOD On) |
Charging | Magnetic charging base (2-pin); Approx. 3 hours to full charge | Fast Wireless Charging (WPC-based puck included; no wall adapter) |
Weight | 68.3 g (without strap) | 59.0 g / 2.08 oz (Case weight only) |
Band Sizes | 22mm width; Fits 145–210mm wrists (Proprietary screws but includes adapters for standard bands in some regions) | Fits wrist sizes ~145–205 mm (M/L strap); Uses standard 20mm width (new One-Click mechanism, backwards compatible) |
Extras | Offline Maps (Contour/Terrain); Turn-by-turn navigation; Zepp Flow (AI voice assistant); Night Display mode; Glove mode | Physical Rotating Bezel for navigation; Camera Controller; SmartThings smart home control; Fall Detection; SOS |
| Pros |
|
|
| Cons |
|
|
As an Amazon Associate I earn from qualifying purchases. | Check Price on Amazon→ | Check Price on Amazon→ |
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
As an Amazon Associate I earn from qualifying purchases.
Check Price on Amazon→
Samsung Galaxy Watch6 Classic (47mm, Bluetooth)
Rating:★3.9(565)Amazon
Compatibility:Android 10.0 or higher with 1.5GB+ RAM (iOS NOT supported; some health features like ECG require a Samsung Galaxy phone)
Operating System:Wear OS 4 (Powered by Samsung, One UI 5 Watch)
Case Size:47mm (46.5 x 46.5 x 10.9 mm / 1.83 x 1.83 x 0.43 in)
Case Material:Case: Stainless Steel; Glass: Sapphire Crystal; Strap: Hybrid Eco-Leather (standard US retail)
Display Type:Super AMOLED touchscreen (Always-On capable)
Display Size:1.5 in (37.3 mm)
Resolution:480 x 480 pixels
Always On Display:Yes
Water Resistance:5 ATM + IP68 (Water resistant up to 50 meters)
Durability:MIL-STD-810H compliant (Environmental engineering considerations and laboratory tests)
GPS:GPS, GLONASS, Galileo, BeiDou
Connectivity:Bluetooth 5.3; Wi-Fi 2.4+5GHz (802.11 a/b/g/n); NFC
NFC Payments:Yes (Samsung Wallet, Google Wallet)
Sensors:Samsung BioActive Sensor (Optical Heart Rate + Electrical Heart + Bioelectrical Impedance Analysis); Temperature Sensor; Accelerometer; Barometer; Gyro Sensor; Geomagnetic Sensor; Light Sensor; 3D Hall Sensor
Health Features:Body Composition (BIA); ECG (AFib detection); Sleep Coaching & Analysis; Blood Oxygen (SpO2); Cycle Tracking (Skin Temperature); Irregular Heart Rhythm Notification
Workout Modes:90+ exercises; Automatic workout detection (Walking, Running, Cycling, Rowing, Elliptical, Dynamic High-Intensity, Swimming); Personalized Heart Rate Zones
Storage:16 GB (Internal) / 2 GB RAM
Speaker Mic:Yes (Built-in speaker and microphone)
Calls:Yes (Make and answer calls via Bluetooth)
Battery:425 mAh; Up to 40 hours (AOD Off); Up to 30 hours (AOD On)
Charging:Fast Wireless Charging (WPC-based puck included; no wall adapter)
Weight:59.0 g / 2.08 oz (Case weight only)
Band Sizes:Fits wrist sizes ~145–205 mm (M/L strap); Uses standard 20mm width (new One-Click mechanism, backwards compatible)
Extras:Physical Rotating Bezel for navigation; Camera Controller; SmartThings smart home control; Fall Detection; SOS
✓ Pros:
- • Iconic physical rotating bezel provides intuitive, smudge-free navigation
- • Comprehensive health suite including FDA-cleared ECG and Body Composition (BIA)
- • Stunning 1.5-inch Super AMOLED display with sapphire crystal protection
- • High-quality stainless steel build feels more premium than aluminum competitors
- • Seamless ecosystem integration with Samsung Galaxy phones
✗ Cons:
- • Battery life (max 40h) requires daily charging compared to multi-day competitors
- • Key health features (ECG, IHRN) are locked to Samsung phones only
- • Not compatible with iPhones (iOS)
- • Charging speed is decent but slower than OnePlus Watch 2's rapid charge
As an Amazon Associate I earn from qualifying purchases.
Check Price on Amazon→
Which one is better?
The Amazfit T-Rex 3 is the better buy for most people - its incredible 27-day battery life crushes the Galaxy Watch6 Classic's 40-hour capability. That said, grab the Galaxy Watch6 Classic if you need advanced health features and a premium design - it's lighter and offers a rotating bezel for easier navigation.
Who should buy each?
Choose the Amazfit T-Rex 3 if: you need up to 27 days of battery life, enjoy outdoor activities with its rugged design, or want extensive offline maps and workout modes.
Choose the Samsung Galaxy Watch6 Classic (47mm, Bluetooth) if: you want advanced health monitoring features like ECG, prefer a premium build with a rotating bezel, or need a device that integrates seamlessly with Samsung smartphones. (2.08 oz weight, 16 GB storage)
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?
Amazfit T-Rex 3 excels if you value incredible 27-day battery life crushes the competition. Samsung Galaxy Watch6 Classic (47mm, Bluetooth) is better if you prioritize iconic physical rotating bezel provides intuitive, smudge-free navigation. 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.
Affiliate disclosure
PageBen uses Amazon affiliate links. If you purchase through our links, we may earn a commission at no extra cost to you. This supports independent content for US shoppers.