Amazfit Bip 3 vs Amazfit T-Rex Ultra
The Verdict
Amazfit's budget and premium smartwatch offerings serve distinctly different needs. Bip 3 delivers exceptional value at $69 with a 14-day battery, basic health monitoring (heart rate, SpO2, sleep tracking), and lightweight 33g design ideal for everyday casual wear. T-Rex Ultra commands a $449.99 premium with GPS, superior AMOLED display (454x454 vs 240x280), rugged stainless steel construction rated 10 ATM for diving, and extended 20-day battery life. Performance-wise, both run Zepp OS but T-Rex Ultra offers Zepp 2.0 with enhanced features. Health tracking mirrors each other,neither includes ECG or skin temperature,but T-Rex Ultra's durability and GPS navigation justify higher cost for serious athletes and outdoor enthusiasts. Budget-conscious users seeking basic fitness monitoring should choose Bip 3, while adventure seekers and fitness enthusiasts demanding durability, navigation, and premium build quality need T-Rex Ultra.
Who Should Buy
Buy the Amazfit Bip 3 if…
- →Incredible value at $69 with heart rate, SpO2, and sleep tracking
- →14-day battery life means charging biweekly at most
- →5ATM water resistance for swimming at a budget price
Buy the Amazfit T-Rex Ultra if…
- →Excellent 20-day battery life with always-on display
- →Dual-band six-satellite GPS for high accuracy
- →Rugged design with 15 military-grade certifications
Category Scores
Pros & Cons
Amazfit Bip 3
Pros
- Incredible value at $69 with heart rate, SpO2, and sleep tracking
- 14-day battery life means charging biweekly at most
- 5ATM water resistance for swimming at a budget price
- 60 sport modes for basic activity tracking
- Lightweight at 33 g — comfortable for all-day wear
Cons
- No built-in GPS — must use connected phone GPS
- TFT LCD display is dim and washes out in direct sunlight
- 240x280 resolution makes text and icons look pixelated
- No NFC, Wi-Fi, or always-on display
- Notification handling is very basic — no actionable replies
Amazfit T-Rex Ultra
Pros
- Excellent 20-day battery life with always-on display
- Dual-band six-satellite GPS for high accuracy
- Rugged design with 15 military-grade certifications
- Free-diving rated to 45 meters
- Offline maps with route import support
Cons
- No ECG, skin temperature, or NFC payments
- No Wi-Fi or cellular connectivity
- Zepp OS app ecosystem is limited
- Heavier than most smartwatches at 89g
- No third-party app store
Full Specifications
| Spec | Amazfit Bip 3 | Amazfit T-Rex Ultra |
|---|---|---|
| Software | Zepp OS | Zepp OS 2.0 |
| Body | ||
| Weight | 33 g | 89 g |
| Case material | Polycarbonate | Stainless steel bezel, fiber-reinforced polymer case |
| Water resistance | 5ATM | 10 ATM, ISO 22810 certified for free-diving to 45m |
| Health & Sensors | ||
| ECG | ||
| SpO₂ | ||
| Skin temperature | ||
| Heart rate | ||
| Sleep tracking | ||
| Battery | ||
| Battery life | Up to 14 days | Up to 20 days typical use, 80 hours GPS |
| Display | ||
| Size | 1.69 inches | 1.39 inch |
| Type | TFT LCD | AMOLED |
| Always-on display | ||
| Resolution | 240 x 280 | 454 x 454 |
| Processor | ||
| Chipset | Huami custom processor | — |
| Connectivity | ||
| GPS | ||
| NFC | ||
| Wi-Fi | ||
| Cellular | ||
| Bluetooth | 5.0 | 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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