Hi, I'm Nerd - passionate about smartwatches, healthy living and sports. This time I took a closer look at Stratos 3, a smartwatch with GPS, Hi-Fi voice calls and an AMOLED display. Here's my comprehensive test - technical and user review.
Technical features (my summary)
Screen: 1.43-inch Ultra-HD AMOLED with 466 × 466 pixels, up to 1,000 nits brightness and Corning Gorilla Glass – excellent sunlight readability.
GPS: Built-in satellite receiver (GPS, GLONASS, GALILEO, BEIDOU), with accurate and fast location search.
Calling: Support for Bluetooth Hi-Fi voice calls with the microphone and speaker on the watch – even without a phone.
Battery: 400 mAh lithium-polymer battery – up to 45 days in power saving mode, up to 20 days during sports use or up to 84 hours of GPS operation. Calling allows up to 545 minutes of talk time. Charging time approx. 1.5 watch.
Health tracking and sports: Heart rate, SpO₂, sleep, more than 100 sports modes and professional FIRSTBEAT algorithms. 80+ or 100+ as between versions.
Water resistance: IP68 standard – suitable for showering, sports or moderate swimming.
Connectivity: Bluetooth Low Energy 5.3, compatible with Android 4.4 and iOS 8.2+, syncs with Strava and Apple Health.
Weight and materials: Metal frame and silicon bracelet – only about 60 g.
My experience with the watch
Design and display
Elegant yet robust. The AMOLED display is extremely clear even in sunlight, the Always-On mode works well without excessive power consumption. Gorilla Glass has proven to be scratch-resistant.
GPS tracking and sports functionality
GPS works quickly and accurately, even when walking or running in the forest. Sports modes recognize more than 100 activities. Heart rate and blood oxygen are measured throughout the day, and activity analysis is meaningful and transparent.
Main advantage: calling
Microphone and speaker allow calls directly from watch. At that moment, the phone is not needed at all – which means greater independence. The sound is clear, but loses volume a bit in noisier environments.
Autonomy
The battery really lasts a long time. It reaches up to 20 days with casual use, and up to 45 days in power saving mode. With active GPS tracking, it lasts up to 84 hours. The call can last a basic 545 minutes.
Weaknesses in practice
The app feels unintuitive at times, with users reporting occasional incomplete syncing. The blood pressure monitor isn't the most accurate. Call quality is poor in noisy city conditions. Some reviewers also point out that the app's navigation isn't as smooth.
Ratings by category
| Category | Rating (★‑★5) | Comment |
|---|---|---|
| Display and readability | ★★★★★ | AMOLED display, clear even in sunlight |
| GPS and sports tracking | ★★★★☆ | Reliable GPS, wide range of sports modes |
| Voice calls | ★★★★★ | Hi-Fi calls from watch without a phone |
| Battery and autonomy | ★★★★★ | Up to 45 days of energy-saving operation, exceptional durability |
| Health functions (SpO₂) | ★★★★☆ | Comprehensive monitoring, but blood pressure monitor less accurate |
| Connectivity and application | ★★★☆☆ | Syncing works, but the app could be better |
| Water resistance and robustness | ★★★★☆ | IP68 reliability, durable design |
Overall rating: about 4.4/5
I recommend the Stratos 3 if:
you want shiny AMOLED display and clear GPS, no phone during sports,
you need calls directly from watch (Bluetooth Hi‑Fi) for hands-free device,
you appreciate long battery life (several days without charging),
You are an active user (competition, hiking, fitness) and want precise control of your physical activity.
It may not be the best fit if:
it is important to you extremely precise application and complete stability (some users mention application errors),
you are looking for a very specific blood pressure monitor,
You need higher protection (IP69K or industrial durability), which the Stratos 3 model does not have.
Purchase smartwatches at Piflar: Stratos 3
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