TOZO AMOLED S4 AcuFit One Smart Watch 1.78" Ultra-Clear Screen for Men Women, Call/Answer Fitness Tracker,Sleep Monitor IP68 Waterproof for iOS 11.0+ Android 9.0+ Black
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This item is eligible for return within 30 days of receipt
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
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Availability:
20 left in stock
Arrives
Tuesday, Jul 29
Color: Black
Features
- User-Friendly Design with AMOLEDFeaturing an upgraded 1.78'' ultra-clear AMOLED HD Display with 368*448 resolution, which has 25% faster response speed than previous, a wider visual range, lower energy consumption, wider color gamut, and higher contrast, TOZO S4 takes you to experience unprecedented crystal clear visual effects.
- All-in-One Smart WatchTOZO smart watch is the perfect companion for both men and women, combining a fitness tracker and a stylish accessory all in one. Stay connected with its Bluetooth calling feature, as well as call logs and message notifications.
- Comprehensive Health MonitoringTOZO S4 adopts an high-precision sensor that accurately stress testing in real time. Furthermore, the health watch tracks your sleep patterns to ensure you get the restful night's sleep you deserve, including deep sleep, light sleep, and REM sleep stages.
- Versatile Fitness TrackerWith over 100 different sports modes, our TOZO S4 helps you stay active and reach your fitness goals. Whether you're running, cycling, or practicing yoga, this watch will accurately track your workouts and provide valuable insights to improve your performance.
- Worry-free Battery LifeEquipped with a high-capacity 300 mAh battery that ensures up to 7 days of use on a single charge, ultra-long 30 days standby mode, and takes only about 2 hours to fully charge, The activity tracker fulfills your need for long battery life on business trip or travel. Plus, it is waterproof, making it perfect for daily outdoor activities.
Operating System: NO
Memory Storage Capacity: 128 MB
Special Feature: Touchscreen, Email, Text Messaging, Activity Tracker
Battery Capacity: 300 Milliamp Hours
Connectivity Technology: Bluetooth
Wireless Communication Standard: Bluetooth
Battery Cell Composition: Lithium
GPS: No GPS
Shape: Square
Screen Size: 1.78 Inches
Product Dimensions: 6.46 x 4.5 x 0.75 inches
Item Weight: 1.38 ounces
Item model number: S4
Batteries: 1 Lithium Metal batteries required. (included)
Date First Available: November 7, 2023
Manufacturer: TOZO
Country of Origin: China
Item Weight: 39 Grams
Standing screen display size: 1.78 Inches
Memory Storage Capacity: 128 MB
Ram Memory Installed Size: 128 MB
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Jul 29
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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- Affirm Financing
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- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
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Top Amazon Reviews
Color: Black
I’ve been using the TOZO AMOLED S4 AcuFit One Smart Watch for a few weeks now, and it’s been a pleasant surprise. The 1.78” AMOLED display is crisp and vibrant, making it easy to read notifications and track fitness stats. Navigating through the menus is straightforward, and the watch feels lightweight and comfortable on the wrist. In terms of functionality, it covers all the basics: heart rate monitoring, sleep tracking, step counting, and even Bluetooth calling. The battery life is impressive—I only need to charge it once a week. While it doesn’t have some of the advanced features of higher-end smartwatches, for its price point, it’s a solid choice for anyone looking for a reliable fitness tracker with smart capabilities.
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Reviewed in the United States on May 6, 2025 by Michael MacMillan Michael MacMillan
Color: Black
My son has been using the TOZO smartwatch for a few weeks now, and hes genuinely impressed. The sleek design and bright display make it feel premium, especially at such an affordable price. It syncs easily his my phone, and the fitness tracking features—steps, heart rate, and sleep—are surprisingly accurate. I also like how the battery lasts several days on a single charge. Notifications come through reliably, and it's water-resistant enough for daily wear and workouts. While it’s not as advanced as an Apple Watch, for the price, my son loves it - a fantastic value. Overall, he's very happy with my TOZO watch.
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Reviewed in the United States on June 11, 2025 by BradnMCO
Color: Black
This is my first smart watch and I got it shortly before a trip. I had thought about getting one previously but being someone who hasn’t wear a watch in years, I had been putting it off. Finally decided to take the plunge. I wasn’t sure what to expect but am pleasantly surprised by it. Very easy to use out of the box. I downloaded the TOZO Health app and paired it with my phone. It can track some health information, such as heartbeat, steps, stress level, sleep habits. It was nice to be able to track these on my trip as I walked a lot. Also, the watch does change time zone when you travel but it takes a little time to do so. The weather, however, is to the location you set on the watch and it does not change based on your physical location. You need to turn on notifications from the app to receive and take calls from your phone. I tried the call function a couple of times and it works well; I was able to hear the caller and they can hear me. To get text messages and other notifications, you also need to go to notifications on the app, under app messages, and you can select what app to turn on notifications for. It has a bunch of selection like Facebook, Instagram, etc. but it doesn’t list Messages app for iPhone. However, turn on “Others” and you will be able to get Messages app notifications as well as others that are not listed. I like being able to see the text messages on the watch, but you can’t respond from the watch, so that is one improvement that can be made to the next version. You can also set notifications or reminders to get up and walk around at hour intervals, drink water, wash your hands, or take your medicine. Or set additional alarms or reminders. The app contains a lot of options for the watch display; it has 4 preset displays which can’t be changed and 1 you can change. It would be nice if you can change all four displays to your own selection, or choose what information you want displayed, so another area for improvement. The watch does not have the ability to go online and surf the web for information. Also, it was a little confusing at first as some functions can be set on the watch itself while others need to be set on the app, or some can be done on either the watch or app, so it takes a little bit to get used to as to where to find certain things. The band is wide and comfortable. I did sleep with it on the first night just to see how it works; the watch is a little big and I can feel it as I put my arm on my head occasionally when sleeping, but I am someone who hasn’t wore any watches for years so it would take some getting used to. The watch provided me information about how long I was in different stages of sleep (REM, deep, light). The watch also has exercise functions (can set goals and track to see if you meet them), but I haven’t used this function except to track steps. Battery life is great as I can go for 4-5 days without charging; I usually charge it when it goes below 50% battery life so I can probably go for a few more days. Family members who are Apple watch users told me they have to charge theirs daily. Not having to charge daily is a big plus for me. Overall, I am VERY impressed with my first smart watch and would recommend it given its price point and functionality.
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Reviewed in the United States on February 24, 2024 by Curious4
Color: Black
The TOZO S4 AcuFit One Smart Watch is a fantastic addition to my daily routine. It's a pleasure to wear all day long, whether I'm hitting the gym or heading to the office. The array of features is impressive. From accurate fitness tracking to convenient notifications, it helps me stay on top of my health and productivity goals. One great feature is its impressive battery life. I can go days without needing to recharge, even with heavy use. The intuitive interface makes it easy to navigate between different functions, and the touchscreen is responsive and easy to use. There are a few minor drawbacks. The screen can be difficult to read in direct sunlight, and the proprietary charging cable can be easy to misplace. Overall, the S4 AcuFit offers great value for its price point. It's a stylish, functional accessory that helps me stay organized and motivated throughout the day.
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Reviewed in the United States on February 25, 2024 by Reilly H.
Color: Black
Budget is not as bad thing...tech can cost so much these days but is it really worth it? The price point of this watch is prefect if you are looking to start wearing a smart watch, or simply need a watch for the time, activity tracking, app alerts and basic health. This is not as fully featured as a Google Wear, Samsung or Apple watch.... but it's also a fraction of the price. It is comfortable to wear all day, the battery lasts the whole week, I get all my alerts and calls so it does all I need. It is a great product from a great company.
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Reviewed in the United States on July 11, 2025 by Mr & Mrs. Younger
Color: Black
I'm becoming a TOZO fan boy! I have the NC9 earbuds and HT2 headphones. Impressed with both of those I ordered the S4 smartwatch. I have been wearing my S4 for a few days now and have to say I love it! The size is perfect. The screen is very clear and very bright, making viewing easy, especially at night. I use mine mostly for the time and weather information and answering phone calls. There are many health monitoring functions available that I need to start taking advantage of. The watch is very comfortable and looks great! Three days and the battery is still at 73%. The screen blacks out until you raise your arm or turn your wrist to look at it, works awesome. TOZO products are priced far below most of the competition and the quality is excellent! I purchased all three items for the cost of one of most other brands! I hope you give TOZO a try, you won't be disappointed!
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Reviewed in the United States on May 21, 2025 by Ron Ron