Amazfit GTS 4 Mini vs Amazfit T-Rex 2
The Verdict
The GTS 4 Mini excels as a compact, lightweight daily wear option at $99, featuring a 42mm AMOLED display and an impressive 15-day battery life in a svelte 31.2g package. Its Zepp OS 2.0 and Bluetooth 5.2 connectivity provide snappy performance for basic fitness tracking, heart rate monitoring, and sleep analysis. The T-Rex 2, priced at $229, targets adventure seekers with a rugged 47mm display (454 x 454 resolution versus 336 x 384), superior 10ATM water resistance for diving, and exceptional 24-day battery stamina plus 45-hour GPS endurance. It weighs 66.5g with reinforced polymer construction designed for harsh conditions. Both watches share core health features, but the T-Rex 2's larger screen and durability justify its premium for outdoor enthusiasts, while the GTS 4 Mini wins for everyday elegance and portability. Your choice depends on lifestyle: pick the Mini for fashion-forward minimalism and value, or choose the T-Rex 2 for expedition-grade reliability and extended screen real estate.
Who Should Buy
Buy the Amazfit GTS 4 Mini if…
- →15-day battery life is exceptional for an AMOLED smartwatch
- →Very affordable at just $99 with solid fitness features
- →Lightweight at 31.2 g — comfortable for 24/7 wear and sleep tracking
Buy the Amazfit T-Rex 2 if…
- →MIL-STD-810G rated for extreme temperature, humidity, and shock resistance
- →24-day battery life with 45 hours of continuous GPS tracking
- →10ATM water resistance for swimming and water sports
Category Scores
Pros & Cons
Amazfit GTS 4 Mini
Pros
- 15-day battery life is exceptional for an AMOLED smartwatch
- Very affordable at just $99 with solid fitness features
- Lightweight at 31.2 g — comfortable for 24/7 wear and sleep tracking
- Built-in GPS for outdoor activity tracking
- 120+ sport modes cover nearly every activity
Cons
- No NFC for contactless payments
- Limited smart features — no app store for third-party apps
- No Wi-Fi for faster syncing or standalone functionality
- Zepp OS has fewer integrations than Wear OS or watchOS
- Small display may be hard to read for some users
Amazfit T-Rex 2
Pros
- MIL-STD-810G rated for extreme temperature, humidity, and shock resistance
- 24-day battery life with 45 hours of continuous GPS tracking
- 10ATM water resistance for swimming and water sports
- Dual-band GPS for accurate outdoor positioning
- AMOLED display is vibrant and readable in sunlight
Cons
- 66.5 g is heavy — can be uncomfortable for sleep tracking
- No NFC or cellular connectivity
- Zepp OS has limited smart features and app support
- No ECG monitoring
- Bulky design may not suit formal or everyday casual wear
Full Specifications
| Spec | Amazfit GTS 4 Mini | Amazfit T-Rex 2 |
|---|---|---|
| Software | Zepp OS 2.0 | Zepp OS |
| Body | ||
| Weight | 31.2 g (without strap) | 66.5 g (without strap) |
| Case material | Aluminum alloy | Fiber-reinforced polymer with metal buttons |
| Water resistance | 5ATM | 10ATM |
| Health & Sensors | ||
| ECG | ||
| SpO₂ | ||
| Skin temperature | ||
| Heart rate | ||
| Sleep tracking | ||
| Battery | ||
| Battery life | Up to 15 days (typical use) | Up to 24 days (typical), 45 hrs GPS |
| Display | ||
| Size | 42mm | 47mm |
| Type | AMOLED Always-On | AMOLED Always-On |
| Always-on display | ||
| Resolution | 336 x 384 | 454 x 454 |
| Processor | ||
| Chipset | Huami custom SoC | Huami custom SoC |
| Connectivity | ||
| GPS | ||
| NFC | ||
| Wi-Fi | ||
| Cellular | ||
| Bluetooth | 5.2 | 5.0 |
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This comparison is based on verified manufacturer specifications covering display, performance, camera, battery, and build quality. Scores are generated by analyzing specs across weighted categories on a 10-point scale. Learn more about our methodology.
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