The choice of wearable electronics from the Chinese giant has today turned into a difficult quest due to the incredible variety of lines. Users are often lost in acronyms, not realizing how the Xiaomi Watch S3 differs from the Watch 2 Pro or the budget Redmi Watch 4. The brand ecosystem has grown so much that without detailed analysis it is easy to overpay for unnecessary features or, conversely, to miss critical options.
In this review, we’ll break down the key differences between flagship and affordable models so you can make an informed decision. The main selection criteria will depend on your smartphone operating system and the purpose of using the gadget.
We'll analyze the specifications, the quality of the materials in the case, the accuracy of the health sensors, and the software is also critical, because it's the key to the stability of the pairing and the functionality, and let's figure out which model is the perfect companion for you.
Xiaomi Watch S flagship series: premium segment
The Watch S series represents the pinnacle of the company’s engineering, offering customers top-quality materials and advanced functionality, using sapphire glass, titanium or stainless enclosures, and advanced biometric sensors, designed for those looking for a status accessory with the maximum range of capabilities.
Xiaomi Watch S3 was revolutionary with Quick-Release, a fast-change system and the ability to install third-party dials with widgets, and unlike previous generations, it features full NFC support for payment and access, as well as dual-band navigation, a choice for people who need it not only for sports but also for business meetings.
On the other hand, the Watch 2 Pro runs on Google's Wear OS, which changes the experience dramatically: you get access to the Google Play app store, the ability to install maps, instant messengers, and full notifications, but you have to pay more for it than you would on proprietary systems.
- 🔍 Materials: Stainless steel 316L, sapphire glass, ceramic bezel.
- 📡 Communication: Bi-band GPS (L1+L5), Bluetooth 5.3, NFC, Wi-Fi.
- 🏊 Protection: Water resistance up to 5 ATM (diving up to 50 meters).
What is the difference between HyperOS and Wear OS?
It is important to consider that the functionality of the watch can vary depending on the regional version of the firmware. Global versions often have a stripped-down set of dials compared to Chinese ones, although the basic functions remain identical.
Redmi Watch Series: Balance of Price and Functionality
The Redmi Watch line is aimed at the mass user, offering a great screen and basic health monitoring at an affordable price. Here you will not find metal housings or complex mechanical bezels, but you will get a modern design and high autonomy.
The Redmi Watch 4 is a huge model. AMOLED-It's a thin-framed display with an aluminum fused body, and despite the plastic glass, it has an oleophobic coating that is resistant to scratching in the home. HyperOS runs smoothly here, providing fast switching between menus and responsive touchscreen.
⚠️ Note: The Redmi series often lacks built-in GPS-module (depends on the specific model and year of release), so for accurate tracking of runs without a phone, you need to check the specification before buying.In the Watch 4 GPS It was built in, but in older versions it was not.
For sports enthusiasts, there is a wide range of more than 150 training regimens, pulse and oxygen saturation (SpO2) sensors work with sufficient accuracy for the amateur level, notifications come instantly, allowing you to answer calls directly from the wrist thanks to the built-in microphone and speaker.
Comparison of operating systems: HyperOS vs. Wear OS
Understanding the difference between software platforms is key to making the right choice. HyperOS (formerly known as MIUI for Watch) is designed specifically for energy efficiency. It provides stable performance for 10-15 days, but limits the user to a pre-installed set of applications.
In turn, Wear OS turns the watch into a mini-smartphone, which can download maps for offline navigation, listen to music through streaming services without a phone, and even pay for purchases through Google Pay (where it is supported), but such functionality requires daily or bi-day recharging.
HyperOS is designed to be controlled via a rotating bezel (in some models) or swipe, which is very convenient in gloves or in the cold. Wear OS relies on touch control and the Google Assistant voice assistant, which requires more interaction with the screen.
| Characteristics | HyperOS (S3, Redmi) | Wear OS (Watch 2 Pro) | Proprietary (old models) |
|---|---|---|---|
| Autonomy | Up to 15 days. | 24-48 hours | Up to 20 days. |
| Installation of applications | Limited to the Xiaomi store | Google Play (Thousands of Apps) | Impossible. |
| Compatibility | Android 6.0+, iOS 12+ | Android 8.0+ (iOS limited) | Android/iOS |
| Responses to communications | Templates (Android/iOS) | Voice, keyboard, manuscript | Only templates. |
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If you need a full-fledged smart background on your wrist with maps and apps, choose Wear OS. If autonomy and sports are important, HyperOS.
Health monitoring and sports functions
Modern Xiaomi gadgets are equipped with a sensor BioTracker (in different versions), which provides round-the-clock measurement of heart rate, stress levels and sleep quality. Data analysis algorithms are constantly being improved to detect abnormal heart rhythms and warn of potential risks.
For professional athletes, accuracy is important. GPS-Flagship models support five satellite systems (GPS, GLONASS, Galileo, BDS, QZSS), And this is a way to ensure that you can build a precise route, even in dense urban areas or in the forest, and budget models can use your smartphone as a coordinate source, which is less convenient for runners.
The function of measuring blood oxygen saturation (SpO2) has become the de facto standard, useful not only for assessing recovery from high-altitude climbs, but also for general monitoring of the body's condition, and synchronized with the Mi Fitness app (formerly Zepp Life), which builds detailed statistics.
- 💓 Pulse: Measurement every 1-10 minute-by-minute.
- 😴 Sleep: Analysis of phases, daytime sleep and breathing during rest.
- 🏃 Automatic recognition of 6 popular activities.
Design, materials and customization
The look of the device is often a deciding factor. Xiaomi Watch S3 offers a unique opportunity to change not only the strap, but also the outer ring bezel, which allows you to transform the style from sports to classic.
AMOLED screens provide deep black color reproduction and high brightness, readable under direct sunlight. The All-Included Display (AOD) is available in almost all modern models, allowing you to see time without lifting your wrist, although this reduces autonomy.
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Use dials with minimal widgets if you want to extend the clock from a single charge. Animated live dials consume the battery faster than static ones.
Fluoroelastomer straps are easy to wash and do not absorb sweat, which is ideal for training. Leather and Milanese stainless steel weaves give the device elegance, but require more careful handling and regular cleaning from dirt.
Compatible with iOS and Android
The devices work perfectly in conjunction with Android smartphones, providing full access to all settings through the Mi Fitness app. iPhone users can also successfully use the watch, but the functionality can be slightly reduced: for example, the inability to quickly respond to messages or use the watch as a camera remote.
To pair, you need to download the application from the App Store or Google Play. The initial setup process takes no more than 2-3 minutes and is automatic. It is important to keep the application up to date for proper data synchronization.
⚠️ Note: When changing your smartphone to another operating system (from Android to iOS or vice versa), it is recommended to perform a full reset (Factory Reset) in order to avoid conflicts of synchronization and duplication of data.
Some features, such as music management or notification display, work consistently on both platforms, but the built-in voice assistant may be limited to iOS functionality due to Apple's security policy.