The S90 smartwatch is designed as an affordable everyday wearable that combines phone notifications, Bluetooth calling, fitness tracking, and basic health monitoring in a traditional watch-style design. Its main hardware highlights include a 1.39-inch 360×360 display, Bluetooth 5.2 connectivity, a 430mAh battery, and IPX8 water resistance.
Rather than concentrating on one particular function, the S90 brings several smartphone companion features into a single wearable. It can display notifications, handle Bluetooth calls, control music, provide weather information, and track activities through multiple sports modes.
A Large Round Display for Everyday Use
The S90 uses a 1.39-inch TFT screen with a 360×360-pixel resolution. The display is controlled through a full-touch interface, allowing users to navigate menus and access different functions directly from the watch.
The watch also supports customizable watch faces and a dial market, giving users the option to change the appearance of the main screen.
For everyday use, the relatively large circular display should make information such as notifications, steps, workout data, and incoming-call information easier to view than on a very small wearable screen.
The watch case measures approximately 49 × 49 × 14.2mm, while the supplied silicone strap is about 220mm long and 22mm wide. The case combines ABS, PC, and zinc alloy materials.
Bluetooth Calling Keeps the Phone in Your Pocket
One of the S90’s more practical features is Bluetooth calling, a feature increasingly common in modern Bluetooth calling smartwatches.
After pairing the watch with a compatible smartphone, users can receive call-related notifications and use the watch for Bluetooth calls. The device also supports message reminders and app notifications, making it possible to see important alerts without immediately reaching for the phone.
The S90 uses Bluetooth 5.2 and works with devices running Android 9.0 or later and iOS 9.0 or later.
The watch connects through the Zmoofit app, which is used for configuration and synchronization. The product listing recommends installing the app before using the watch to ensure compatibility with the connected phone.
Health Tracking Covers the Basics
The S90 includes several health-monitoring functions, including heart-rate monitoring, blood-pressure monitoring, blood oxygen (SpO₂) monitoring, and sleep tracking, making it relevant to users interested in smartwatch health tracking.
It also records everyday activity metrics such as steps, distance, and calories. This gives users a general overview of their daily movement and exercise habits.
However, these functions need to be understood in the right context. The product listing explicitly describes the S90 as non-medical equipment and says its health-test data is intended for reference rather than medical use.
That distinction is important for anyone considering the watch because readings from a consumer smartwatch should not be treated as a substitute for professional medical equipment or medical advice.
Multiple Sports Modes for Daily Activity
The S90 also works as a basic fitness smartwatch through its multiple sports modes.
During exercise, the watch can record information such as steps, distance, and calorie expenditure. Users who mainly want a simple way to keep track of daily movement may find these functions more useful than advanced training analytics.
The combination of activity recording and sleep monitoring also means the S90 can provide a broader picture of everyday habits rather than focusing exclusively on workouts.
IPX8 Protection, With an Important Limitation
The S90 carries an IPX8 water-resistance rating, which is one of its notable durability features.
However, an IPX8 rating should not automatically be interpreted as meaning the watch is suitable for every swimming or water-based activity. Banggood specifically says that the S90 is not recommended for swimming because it is not a professional swimming watch.
For that reason, the water resistance is better viewed as useful protection for everyday exposure to water rather than a guarantee for extended swimming sessions.
430mAh Battery Aims for Several Days of Use
The S90 includes a relatively large 430mAh battery for its class. The listing rates it for approximately 5–7 days of normal use and around 20–30 days on standby.
Charging takes approximately 2–3 hours using the supplied magnetic charging system.
Actual battery life will depend on factors such as Bluetooth calling, screen usage, notifications, health monitoring, and sports tracking. Users who make frequent calls through the watch or use monitoring features heavily should expect different results from the maximum figures listed by the manufacturer.
More Than a Fitness Tracker
The S90 also includes several small features that make it function more like a general-purpose smartwatch.
Users can control music playback, operate a paired phone’s camera, set alarms, use a stopwatch, check weather information, adjust display brightness, locate a connected phone, and activate Do Not Disturb mode.
These functions are not individually unusual, but together they make the S90 more useful as a smartphone companion. Someone buying the watch primarily for notifications and convenience may get as much value from these everyday tools as from its fitness features.
S90 Smartwatch Specifications
| Feature | S90 |
|---|---|
| Display | 1.39-inch TFT |
| Resolution | 360 × 360 pixels |
| Bluetooth | Bluetooth 5.2 |
| Compatible OS | Android 9.0 / iOS 9.0 and above |
| App | Zmoofit |
| Controls | Full touch |
| Battery | 430mAh |
| Normal use | About 5–7 days |
| Standby | About 20–30 days |
| Charging | Magnetic charging |
| Charging time | About 2–3 hours |
| Water resistance | IPX8 |
| Health features | Heart rate, blood pressure, SpO₂, sleep |
| Fitness | Multiple sports modes, steps, distance, calories |
| Calls | Bluetooth calling |
| Strap | Silicone |
| Case | ABS + PC + zinc alloy |
| Case size | About 49 × 49 × 14.2mm |
These specifications are based on the current product listing.
Who Should Consider the S90?
The S90 smartwatch makes the most sense for users looking for a broad collection of everyday wearable features without necessarily needing advanced smartwatch hardware.
Its 1.39-inch display provides a relatively spacious interface, while Bluetooth calling and notification support make it useful as a phone companion. Fitness tracking, sleep monitoring, music control, weather information, and phone-finding functions add further convenience.
The 430mAh battery is another practical advantage, with the manufacturer listing several days of normal use. IPX8 water resistance also adds protection for everyday situations, although the watch is not positioned as a dedicated swimming device.
The health-monitoring functions should be treated more cautiously. Heart rate, blood pressure, and SpO₂ readings can be useful for general reference, but the manufacturer clearly states that the device is not medical equipment.
Overall, the S90 is best viewed as an all-purpose budget smartwatch that combines communication, fitness, convenience, and basic health-tracking functions in one device. Its strongest appeal is the breadth of features rather than any single advanced capability.