← Back to Smartwatches
2026 comparison
Updated Jan 7, 2026
|Sources: Amazon, ManufacturerAmazfit T-Rex 3 vs Samsung Galaxy Watch 8 Classic
The Amazfit T-Rex 3 is the mid-range champ, while the Samsung Galaxy Watch 8 Classic plays in the premium league. If you’re after a rugged smartwatch with insane battery life, the T-Rex 3's 27-day duration is hard to beat. Here’s the kicker: the Galaxy Watch 8 Classic's 3,000-nit display means you’ll have zero trouble reading it under bright sunlight. After testing both, the choice really boils down to what you value more: battery longevity or display brilliance.
⚖️ Weight: 2.41 oz vs 2.24 oz💽 Storage: 32 GB vs 64 GB🔋 Battery: 27 days vs 49 hours
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 Watch 8 Classic
★4.5
(920)•Amazon
Compatibility:Android 12.0 or higher with 1.5GB+ RAM (Galaxy phone required for full feature set)
Operating System:Wear OS 6 (Powered by Samsung) with One UI 8 Watch
Case Size:46mm (46.4 x 46.0 x 10.6 mm)
Case Material:Stainless steel case; Sapphire Crystal glass (Front and Back)
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 Watch 8 Classic
Display2 specs
Display SizeKey
Amazfit T-Rex 3
1.5 in (38.1 mm) diameter
Samsung Galaxy Watch 8 Classic
1.34 in (34.0 mm)
Resolution
Amazfit T-Rex 3
480 x 480 pixels (322 ppi)
Samsung Galaxy Watch 8 Classic
438 x 438 pixels (327 ppi)
Performance1 specs
Storage
Amazfit T-Rex 3
32GB (Approx. 26GB user-accessible for Music/Maps)
Samsung Galaxy Watch 8 Classic
64GBWinner
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 Watch 8 Classic
445 mAh; Up to 49 hours (typical usage); Fast wireless charging (WPC)
Design2 specs
Weight
Amazfit T-Rex 3
68.3 g (without strap)
Samsung Galaxy Watch 8 Classic
63.5 g (without strap)Winner
Water Resistance
Amazfit T-Rex 3
10 ATM (100 meters); Freediving certified (EN13319) to 45m
Samsung Galaxy Watch 8 Classic
5 ATM + IP68 (Water resistant up to 50 meters)
Software1 specs
Operating System
Amazfit T-Rex 3
Zepp OS 4
Samsung Galaxy Watch 8 Classic
Wear OS 6 (Powered by Samsung) with One UI 8 Watch
Connectivity1 specs
Connectivity
Amazfit T-Rex 3
Wi-Fi (2.4GHz); Bluetooth 5.2; BLE
Samsung Galaxy Watch 8 Classic
LTE (Optional); Bluetooth 5.3; Wi-Fi 802.11 a/b/g/n (2.4+5GHz); 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 Watch 8 Classic
Amazfit T-Rex 3
★4.5(1,926)Amazon
Samsung Galaxy Watch 8 Classic
★4.5(920)Amazon
| Criterion | Amazfit T-Rex 3 | Samsung Galaxy Watch 8 Classic |
|---|---|---|
| Rating | ★4.5(1,926)Amazon | ★4.5(920)Amazon |
Compatibility | Android 7.0 or later; iOS 14.0 or later (Zepp App required) | Android 12.0 or higher with 1.5GB+ RAM (Galaxy phone required for full feature set) |
Operating System | Zepp OS 4 | Wear OS 6 (Powered by Samsung) with One UI 8 Watch |
Case Size | 48.5mm x 48.5mm x 13.75mm | 46mm (46.4 x 46.0 x 10.6 mm) |
Case Material | Polymer middle frame; Stainless steel bezel (316L) | Stainless steel case; Sapphire Crystal glass (Front and Back) |
Display Type | AMOLED; Gorilla Glass; Peak brightness 2000 nits | Super AMOLED Color Always-On Display |
Display Size | 1.5 in (38.1 mm) diameter | 1.34 in (34.0 mm) |
Resolution | 480 x 480 pixels (322 ppi) | 438 x 438 pixels (327 ppi) |
Always On Display | Yes | Yes (Up to 3,000 nits peak brightness) |
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 military standard; Stainless steel frame |
GPS | Dual-band GNSS (L1+L5); 6 Satellite Positioning Systems (GPS, GLONASS, Galileo, BeiDou, QZSS, NAVIC) | Dual-band GPS (L1+L5); GLONASS, Galileo, BeiDou |
Connectivity | Wi-Fi (2.4GHz); Bluetooth 5.2; BLE | LTE (Optional); Bluetooth 5.3; Wi-Fi 802.11 a/b/g/n (2.4+5GHz); NFC |
NFC Payments | Zepp Pay (Europe/parts of Asia only); Not supported on US models | Samsung Wallet; Google Pay |
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 Bio-signal + Electrical Heart Signal + BIA); 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 | Vascular Load monitoring; Antioxidant Index (AGEs); Sleep Apnea detection; ECG; Blood Pressure (market dependent); Body Composition (BIA); Cycle Tracking with skin temp |
Workout Modes | Hyrox Race mode; Ultramarathon; Freediving; Strength Training (auto-detection of 25 movements); Triathlon; Skiing; Snowboarding; Surf; and 170+ others | Advanced Running Coach; Multisport tile; Race partner; Heart Rate Zones; Auto-detection for workouts |
Storage | 32GB (Approx. 26GB user-accessible for Music/Maps) | 64GB |
Speaker Mic | Microphone (for Zepp Flow voice commands); No Speaker (Buzzer/Beeper only for alerts) | Speaker (supports media/calls/Gemini); Microphone |
Calls | No (Cannot answer calls on wrist; can reject/ignore calls) | Yes (via Bluetooth or standalone on LTE models) |
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) | 445 mAh; Up to 49 hours (typical usage); Fast wireless charging (WPC) |
Charging | Magnetic charging base (2-pin); Approx. 3 hours to full charge | Fast Wireless Charging |
Weight | 68.3 g (without strap) | 63.5 g (without strap) |
Band Sizes | 22mm width; Fits 145–210mm wrists (Proprietary screws but includes adapters for standard bands in some regions) | 20mm standard (One Click system supported) |
Extras | Offline Maps (Contour/Terrain); Turn-by-turn navigation; Zepp Flow (AI voice assistant); Night Display mode; Glove mode | Physical rotating bezel; Integrated Google Gemini AI; Gesture controls (Double pinch); Customizable Quick Button |
| 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 Watch 8 Classic
Rating:★4.5(920)Amazon
Compatibility:Android 12.0 or higher with 1.5GB+ RAM (Galaxy phone required for full feature set)
Operating System:Wear OS 6 (Powered by Samsung) with One UI 8 Watch
Case Size:46mm (46.4 x 46.0 x 10.6 mm)
Case Material:Stainless steel case; Sapphire Crystal glass (Front and Back)
Display Type:Super AMOLED Color Always-On Display
Display Size:1.34 in (34.0 mm)
Resolution:438 x 438 pixels (327 ppi)
Always On Display:Yes (Up to 3,000 nits peak brightness)
Water Resistance:5 ATM + IP68 (Water resistant up to 50 meters)
Durability:MIL-STD-810H military standard; Stainless steel frame
GPS:Dual-band GPS (L1+L5); GLONASS, Galileo, BeiDou
Connectivity:LTE (Optional); Bluetooth 5.3; Wi-Fi 802.11 a/b/g/n (2.4+5GHz); NFC
NFC Payments:Samsung Wallet; Google Pay
Sensors:Samsung BioActive Sensor (Optical Bio-signal + Electrical Heart Signal + BIA); Temperature sensor; Accelerometer; Barometer; Gyro sensor; Geomagnetic sensor; Light sensor; 3D Hall sensor
Health Features:Vascular Load monitoring; Antioxidant Index (AGEs); Sleep Apnea detection; ECG; Blood Pressure (market dependent); Body Composition (BIA); Cycle Tracking with skin temp
Workout Modes:Advanced Running Coach; Multisport tile; Race partner; Heart Rate Zones; Auto-detection for workouts
Storage:64GB
Speaker Mic:Speaker (supports media/calls/Gemini); Microphone
Calls:Yes (via Bluetooth or standalone on LTE models)
Battery:445 mAh; Up to 49 hours (typical usage); Fast wireless charging (WPC)
Charging:Fast Wireless Charging
Weight:63.5 g (without strap)
Band Sizes:20mm standard (One Click system supported)
Extras:Physical rotating bezel; Integrated Google Gemini AI; Gesture controls (Double pinch); Customizable Quick Button
✓ Pros:
- • Iconic physical rotating bezel for intuitive navigation
- • Display brightness doubled to 3,000 nits (matches Ultra model)
- • Storage capacity increased to 64GB (up from 16/32GB in previous Classics)
- • Premium stainless steel build looks more like a traditional timepiece
✗ Cons:
- • Small 1.34" screen relative to the large 46mm case size (bezel takes up space)
- • Significantly heavier (63.5g) than the aluminum standard models
- • Battery (445 mAh) is smaller than the Galaxy Watch Ultra (590 mAh)
- • Some health features (AGEs, BP) are Samsung Galaxy phone exclusive
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 Watch 8 Classic's 49 hours. That said, grab the Galaxy Watch 8 Classic if you want a gorgeous display and premium feel - it's lighter.
Who should buy each?
Choose the Amazfit T-Rex 3 if: you love outdoor adventures and need 27 days of battery life, you prefer a rugged design for extreme conditions, or you want to save money without sacrificing features.
Choose the Samsung Galaxy Watch 8 Classic if: you prioritize a stunning display for outdoor visibility, you want advanced health tracking features, or you prefer a more traditional watch feel with a rotating bezel. (2.24 oz weight, 64 GB storage)
Conclusion
Amazfit T-Rex 3 and Samsung Galaxy Watch 8 Classic are both solid choices. Match the strengths above to your budget and workflow to make the best call.
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 Watch 8 Classic is better if you prioritize iconic physical rotating bezel for intuitive 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.