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 In Stock

$49.99

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Customers say

Customers appreciate the value for money, watch quality, and sleep tracking features of the wearable computer. They find it a nice watch for daily use with good battery life that lasts for days without charging. The health monitoring features are impressive, offering accurate readings for heart rate, steps, and sleep. Many customers appreciate the 30-day standby mode perfect for travelers. Overall, they say the watch does almost everything they need and has more functionality than their previous smartwatch.

AI-generated from the text of customer reviews

244 customers mention "Value for money"232 positive12 negative

Customers appreciate the value for money of this fitness tracker. They find it a great watch with decent features and good quality for the price.

"…Overall, this is a well-designed, reliable, and affordable smartwatch that delivers excellent value for money…." Read more
"…to friends and family looking for a nice smart watch at a reasonable price." Read more
"Pros: Give this watch is very advanced for the price. The screens graphic quality is very good and has most basic options you could ask for…." Read more
"…and I’m finding that these are pretty good quality products for a great price." Read more
189 customers mention "Sleep tracking"173 positive16 negative

Customers appreciate the sleep tracking feature of the wearable computer. They say it continuously monitors their heart rate and provides accurate readings for steps, sleep patterns, and heart rate variability. The fitness tracking features have motivated them to stay active and improve their health. The high-precision sensor provides accurate readings for heart rate, steps, and sleep patterns. They receive calls, texts, and notifications on their wrist.

"…There’s a lot of good available data, especially the “Wellness Balance” score. I would love to see a speed increase in the loading of the data…." Read more
"…I also enjoy the other features on the watch such as step-tracking, heart rate and sleep patterns…." Read more
"…Messaging and notifications are convenient but sometimes annoying. That’s just me…." Read more
"…Fitness tracking and sleep tracking are thorough and useful. Battery life is great, only losing about 10% a day, and quickly recharging…." Read more
176 customers mention "Battery life"152 positive24 negative

Customers like the battery life of the wearable computer. They say it can go 4-5 days without charging, which is a huge deal. The 300 mAh battery means they're not constantly thinking about it. They also mention that the display can be set to turn off at night or displayed 24/7.

"I am pleased with the comfort and features of this watch. The battery life is good…." Read more
"…The battery is unbelievable. I don't know why it lasts more than a week on a charge when other smartwatches need charging every 18 hours…." Read more
"…The charge lasts for days, and I challenge anyone to find a watch for a better price." Read more
"…Battery life is much better than my past Samsung watches and the sleep tracking looks more accurate as well…." Read more
171 customers mention "Functionality"146 positive25 negative

Customers like the functionality of the smartwatch. They say it works well for monitoring, has more features than their previous smartwatch, and fulfills all their needs. The watch works hand-in-hand with the Tozo health app, providing information on steps, sleep hours, and other activities. It's easy to set up and use with the app, and customers have no issues with compatibility or technical problems. They love the sleep monitor the most.

"…syncs perfectly with both iOS and Android devices, making it versatile for all users…." Read more
"…Fits comfortably and is pretty easy to set up and use with the app. Plenty of display options. Charge lasts nearly a week depending on use…." Read more
"…The screens graphic quality is very good and has most basic options you could ask for…." Read more
"…the TOZO AMOLED S4 AcuFit One Smart Watch to anyone looking for a versatile and reliable smartwatch…." Read more
160 customers mention "Design"154 positive6 negative

Customers like the design of the wearable computer. They say it has a vibrant display with nice vivid colors. The charging speed is fast, and it looks like most smart watches. Some customers appreciate the improved app and that it comes in rose gold.

"…I love the watch face; it is huge and clear. The cellphone call feature is clear and loud and messaging is very readable and accurate…." Read more
"…Part of this is that their app is better designed than others, and also the watch interface is well thought out and user friendly…." Read more
"…Color: nice vivid colors, also improved in this version with a slightly bigger screen…" Read more
"…The watch's sleek design and vibrant AMOLED display are also a joy to look at and use…." Read more
155 customers mention "Ease of use"151 positive4 negative

Customers find the watch user-friendly. They say it's easy to set up and navigate through different modes and apps. The touchscreen display allows for easy interaction and viewing of information. The app is seamless and transitions between them are smooth. The Tozo app is reliable and trouble-free, allowing easy access to alarms and phone calls.

"…The app is pretty seamless and I haven't experienced any glitches between the watch and the app…." Read more
"Looks like the similar big brand watch. Fits comfortably and is pretty easy to set up and use with the app. Plenty of display options…." Read more
"…than others, and also the watch interface is well thought out and user friendly…." Read more
"…It also shows your missed calls and any text messages Ease of setup: simple and bug free using the TOZO app on iOS, although I’m sure it…" Read more
121 customers mention "Clarity"121 positive0 negative

Customers appreciate the wearable computer's clear screen. They find the size and resolution good, with a vibrant display that is easily readable in sunlight. The screen has crisp resolution and vibrant colors, making everything look crystal clear.

"…I love the watch face; it is huge and clear. The cellphone call feature is clear and loud and messaging is very readable and accurate…." Read more
"…The screen is vivid, responsive, and there are many choices for dials. Call quality is great…." Read more
"…It holds a charge forever! The screen size and resolution are great, and it has so many features that I haven't been through them all yet…." Read more
"…The colors aren’t oversaturated and they’re quite crisp…." Read more
10 customers mention "Display quality"10 positive0 negative
"I am thoroughly impressed with this smartwatch! The 1.78" ultra-clear screen is vibrant and easy to read, even under bright sunlight…." Read more
"…Give this watch is very advanced for the price. The screens graphic quality is very good and has most basic options you could ask for…." Read more
"…Clear display light weight, good quality, enough functions for what it is." Read more
"The Tozo S4 is a great smartwatch. The screen is incredibly clear and gives all the details I need…." Read more





Amazing Smartwatch for Active Lifestyles!

5 out of 5 stars

Amazing Smartwatch for Active Lifestyles!
I recently purchased the TOZO AMOLED S4 AcuFit One Smart Watch 1.78", and I couldn’t be happier with my decision. This smartwatch has truly exceeded my expectations in so many ways.Living on an island, I needed a reliable waterproof device, and the TOZO AMOLED S4 delivers beautifully. Whether I'm walking, running, or even just enjoying the beach, I never have to worry about water damage. The watch's sleek design and vibrant AMOLED display are also a joy to look at and use.One of the standout features for me is the ability to answer phone calls and change music right from my wrist. It's incredibly convenient, especially during workouts. The fitness tracking features have motivated me to stay active and improve my health.Overall, I highly recommend the TOZO AMOLED S4 AcuFit One Smart Watch to anyone looking for a versatile and reliable smartwatch. It’s been a fantastic addition to my daily routine, and I believe it will be for yours too.

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Top reviews from the United States



  • Reviewed in the United States on February 20, 2025

    Color: BlackVerified Purchase

    I am pleased with the comfort and features of this watch. The battery life is good. It’s comfortable to wear on sensitive skin, unlike other watches that caused itchiness. The app is pretty seamless and I haven't experienced any glitches between the watch and the app. There’s a lot of good available data, especially the “Wellness Balance” score. I would love to see a speed increase in the loading of the data. Also, the text on watch faces could be a bit larger, making it easier to read. I would buy again and recommend to friends and family looking for a nice smart watch at a reasonable price.

    One person found this helpful


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  • Reviewed in the United States on February 2, 2025

    Color: BlackVerified Purchase

    I have not worn a watch for the past 11 years since I retired. This TOZO AMOLED S4 was so comfortable to wear on my wrist that I have not removed it since its first charge (several weeks ago). I love the watch face; it is huge and clear. The cellphone call feature is clear and loud and messaging is very readable and accurate. I also enjoy the other features on the watch such as step-tracking, heart rate and sleep patterns. The charge lasts for days, and I challenge anyone to find a watch for a better price.


  • Reviewed in the United States on October 2, 2024

    Color: BlackVerified Purchase

    Looks like the similar big brand watch. Fits comfortably and is pretty easy to set up and use with the app. Plenty of display options. Charge lasts nearly a week depending on use. I use it primarily as a watch and secondarily for the heart rate and steps tracking. Calorie counter accuracy, who knows. The sleep and stress tracker features are not accurate but I suspect that is true for all smart watches so I don’t fault it for that. I haven’t really used the phone call feature and don’t expect to. Messaging and notifications are convenient but sometimes annoying. That’s just me. This is my second TOZO product and I’m finding that these are pretty good quality products for a great price.

    3 people found this helpful


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  • Reviewed in the United States on December 17, 2024

    Color: BlackVerified Purchase

    There are many similar watches in the under $100 range, and at first they seem mostly identical, but after trying a number of them, Tozo's are the best, as the reviews show. Part of this is that their app is better designed than others, and also the watch interface is well thought out and user friendly. The screen is vivid, responsive, and there are many choices for dials. Call quality is great. You can enter your own 5 customized Quick Replies to respond to texts. Fitness tracking and sleep tracking are thorough and useful. Battery life is great, only losing about 10% a day, and quickly recharging. We have many TOZO earbuds and watches, and they are a step above similarly priced items.
    One of our TOZO watches became defective, so I contacted TOZO support, and Lilac was very promptly responsive and caring. TOZO went above and beyond to make sure I was satisfied with their support. No wonder we are loyal, repeat customers like so many others.

    One person found this helpful


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  • Reviewed in the United States on September 21, 2024

    Color: BlackVerified Purchase

    Fit: comfortable rubber strap with more than enough levels of adjustment. I like how the strap tucks underneath the rest of the band so it stays secure and out of the way

    Durability: I’ve worn this every day as part of my daily routine for a few weeks now and haven’t been especially careful with it. I’ve used it through gym workouts, working on my car, cooking in the kitchen, and doing some light woodwork, and I remember banging it against things a few times, but it’s held up well so far without chipping the finish (it seems like it’s anodized) or scratching the screen

    Notifications: new to the S4 is call functionality – it has a speaker and microphone so you can take calls using only the watch without your phone on you. It also shows your missed calls and any text messages

    Ease of setup: simple and bug free using the TOZO app on iOS, although I’m sure it works on android as well. You can sync your health data onto the app to see more details

    Color: nice vivid colors, also improved in this version with a slightly bigger screen

    Heart rate monitoring: I had realtime heart rate monitoring turned off, as there was a disclaimer that battery life would be greatly decreased with it on. Battery life was great at about 5-7 days before needing a charge. However, while using the heart rate monitor at the gym it was showing a much lower number than what was showing on the treadmill, so not sure about the accuracy of the monitor here. Also, the sleeping data did not always seem to work properly as it kept showing 0 minutes of REM sleep each night after the first few nights (I specifically remember dreaming too, but it would still show as 0 minutes)

    Overall, for $49, it’s an amazing value for a smartwatch if you need one

    Customer image


    5.0 out of 5 stars

    Great Value Smartwatch

    Reviewed in the United States on September 21, 2024


    Fit: comfortable rubber strap with more than enough levels of adjustment. I like how the strap tucks underneath the rest of the band so it stays secure and out of the way

    Durability: I’ve worn this every day as part of my daily routine for a few weeks now and haven’t been especially careful with it. I’ve used it through gym workouts, working on my car, cooking in the kitchen, and doing some light woodwork, and I remember banging it against things a few times, but it’s held up well so far without chipping the finish (it seems like it’s anodized) or scratching the screen

    Notifications: new to the S4 is call functionality – it has a speaker and microphone so you can take calls using only the watch without your phone on you. It also shows your missed calls and any text messages

    Ease of setup: simple and bug free using the TOZO app on iOS, although I’m sure it works on android as well. You can sync your health data onto the app to see more details

    Color: nice vivid colors, also improved in this version with a slightly bigger screen

    Heart rate monitoring: I had realtime heart rate monitoring turned off, as there was a disclaimer that battery life would be greatly decreased with it on. Battery life was great at about 5-7 days before needing a charge. However, while using the heart rate monitor at the gym it was showing a much lower number than what was showing on the treadmill, so not sure about the accuracy of the monitor here. Also, the sleeping data did not always seem to work properly as it kept showing 0 minutes of REM sleep each night after the first few nights (I specifically remember dreaming too, but it would still show as 0 minutes)

    Overall, for $49, it’s an amazing value for a smartwatch if you need one

    Images in this review

    Customer imageCustomer image

    2 people found this helpful


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  • Reviewed in the United States on March 7, 2025

    Color: BlackVerified Purchase

    I recently purchased the TOZO AMOLED S4 AcuFit One Smart Watch 1.78", and I couldn’t be happier with my decision. This smartwatch has truly exceeded my expectations in so many ways.

    Living on an island, I needed a reliable waterproof device, and the TOZO AMOLED S4 delivers beautifully. Whether I'm walking, running, or even just enjoying the beach, I never have to worry about water damage. The watch's sleek design and vibrant AMOLED display are also a joy to look at and use.

    One of the standout features for me is the ability to answer phone calls and change music right from my wrist. It's incredibly convenient, especially during workouts. The fitness tracking features have motivated me to stay active and improve my health.

    Overall, I highly recommend the TOZO AMOLED S4 AcuFit One Smart Watch to anyone looking for a versatile and reliable smartwatch. It’s been a fantastic addition to my daily routine, and I believe it will be for yours too.

    Customer image


    5.0 out of 5 stars

    Amazing Smartwatch for Active Lifestyles!

    Reviewed in the United States on March 7, 2025


    I recently purchased the TOZO AMOLED S4 AcuFit One Smart Watch 1.78", and I couldn’t be happier with my decision. This smartwatch has truly exceeded my expectations in so many ways.

    Living on an island, I needed a reliable waterproof device, and the TOZO AMOLED S4 delivers beautifully. Whether I'm walking, running, or even just enjoying the beach, I never have to worry about water damage. The watch's sleek design and vibrant AMOLED display are also a joy to look at and use.

    One of the standout features for me is the ability to answer phone calls and change music right from my wrist. It's incredibly convenient, especially during workouts. The fitness tracking features have motivated me to stay active and improve my health.

    Overall, I highly recommend the TOZO AMOLED S4 AcuFit One Smart Watch to anyone looking for a versatile and reliable smartwatch. It’s been a fantastic addition to my daily routine, and I believe it will be for yours too.

    Images in this review

    Customer imageCustomer image


Top reviews from other countries

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  • ام انس
    5.0 out of 5 stars

    Elegant multifunctional smart watch

    Reviewed in the United Arab Emirates on January 2, 2025

    Color: BlackVerified Purchase

    I got this TOZO S4 smartwatch 1 month before .It is elegant ,multifunctional and user friendly with a reasonable price. It helped me with my health issues like sleep study, heart rate and oxygen saturation,mainly when using TOZO Health app, but I hope to get another app. for other functions of the watch.I had an issue with the watch, but the customer service helped me quickly to solve it.






  • Halit aydın
    5.0 out of 5 stars

    Muazzam bir görsellik

    Reviewed in Turkey on July 3, 2024

    Color: BlackVerified Purchase

    Yeni kullanmaya başladım mükemmel fakat tek bir sıkıntı var cihazda Türkçe dil yok



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  • Paolo
    5.0 out of 5 stars

    buon rapporto qualità-prezzo

    Reviewed in Italy on December 15, 2024

    Color: BlackVerified Purchase

    Al momento questo smartwatch costituisce l’ultimo modello della serie prodotto dall’azienda Tozo.

    Avevo già provato i precedenti e ne ero rimasto soddisfatto per il rapporto qualità prezzo e anche in questo caso confermo l’ottimo lavoro fatto dell’azienda nel proporre uno smartwatch con le principali funzioni di base che – allo stesso tempo – permette al cliente di evitare di spendere le alte somme di denaro che richiedono i top di gamma di altre marche più famose.

    Per quanto riguarda le caratteristiche esterne:

    lo smartwatch è leggero e si adatta bene al polso (il mio è di media grandezza).
    Il quadrante è leggero, comodo da indossare e di buona fattura.
    Lo schermo è sufficientemente grande per navigare con comodità nel menù delle funzioni.
    La cassa è di fattura tale per cui appare resistente oltre che bello esteticamente,
    Il display è ampio e muoversi fra le varie funzionalità risulta comodo e intuitivo.

    Per quanto riguardo le funzionalità:

    ho provato tutte le principali funzionalità e ritengo che il livello di prestazioni sia soddisfacente:
    in particolare i dati ottenuti relativamente al monitoraggio dell'attività fisica, del battito cardiaco e del sonno sono stati precisi e utili per intervenire sul miglioramento delle relative attività.

    Vi è la possibilità di fare e rispondere alle chiamate e di leggere le notifiche.

    Altrettanto intuitiva, chiara e ben fatta è l'app TOZO HEALTH (gratuita) utile e comoda da abbinare allo smartwatch sia per regolarne le funzioni sia per visualizzare su uno schermo più ampio i dati archiviati.

    La durata della batteria è assolutamente apprezzabile e personalmente mi dura circa una settimana facendone un uso costante e quotidiano.

    In conclusione:

    lo consiglio a tutti coloro per i quali è sufficiente avere uno smartwatch che offra le funzioni di base e a cui interessa più che altro rimanere in una fascia di prezzo molto più contenuta rispetto ad altri modelli che – pur essendo per altri aspetti più sofisticati – richiedono anche di dover spendere molto di più.


  • Paul
    5.0 out of 5 stars

    Great Watch, Amazing Battery Life!

    Reviewed in the United Kingdom on August 27, 2024

    Color: BlackVerified Purchase

    The TOZO S4 Smartwatch has quickly become a favourite of mine, seamlessly blending style and functionality in a way that feels perfect for everyday use.

    Design and Display The first thing that caught my eye was the watch's sleek design. It has a modern, minimalist look that’s both stylish and versatile, making it easy to wear with anything. The display is crisp and clear, with colours that really pop, making it easy to read in any light. Whether I'm glancing at notifications or checking the time, everything just looks sharp and vibrant.

    Everyday Convenience One of the features I love most is the Bluetooth calling. I can take calls and see messages directly on my wrist, which is incredibly handy when I’m busy or my phone is out of reach. It’s a small thing, but it’s made a big difference in staying connected without having to pull out my phone constantly.

    Health and Fitness Tracking I’ve also been impressed with the health tracking features. The TOZO S4 gives me a real-time look at my heart rate, stress levels, and even sleep patterns. I’ve started paying more attention to how well I sleep, thanks to the detailed insights the watch provides. It’s motivating to see how my sleep habits are improving, and it’s a great reminder to stay on top of my health.

    Fitness Partner As someone who likes to stay active, the S4’s fitness tracking is a big plus. It covers more activities than I knew existed! Whether I’m running, doing yoga, or trying something new, the watch tracks it all. The feedback it gives has helped me tweak my workouts and stay on track with my fitness goals.

    Battery Life and Durability Another thing I appreciate is the battery life. It lasts a full week on a single charge, so I never have to worry about it dying on me. Plus, it’s waterproof, which is great for outdoor activities or just not having to worry about it getting wet.

    Comfort and Style Comfort-wise, it’s a winner. The strap feels soft and light, and the watch itself doesn’t feel bulky or heavy. I also love that I can change the watch face to suit my mood or outfit—it’s a fun way to personalize it.

    Final Thoughts Overall, the TOZO S4 Smartwatch has been a fantastic addition to my daily routine. It’s stylish, packed with useful features, and incredibly user-friendly. Whether you’re looking to stay on top of your health, keep connected, or want a great-looking watch, the S4 is definitely worth considering.






  • Iveta
    5.0 out of 5 stars

    Opción sólida – smartwatch económico y funcional

    Reviewed in Spain on December 29, 2024

    Color: BlackVerified Purchase

    Su diseño es moderno y cómodo, con una pantalla táctil clara de 1,78 pulgadas. Las funciones de llamadas Bluetooth son prácticas, aunque la calidad de sonido es aceptable pero no excelente. El pulsómetro y el monitor de sueño son útiles, aunque no siempre son 100% precisos. Su resistencia al agua (IP68) es un punto fuerte, ideal para nadar o actividades al aire libre. La batería dura entre 3 y 5 días, lo cual es bastante bueno para un dispositivo de este rango. En general, es un buen reloj inteligente para quienes buscan lo básico a un precio accesible.

    Customer image


    Iveta

    5.0 out of 5 stars

    Opción sólida – smartwatch económico y funcional

    Reviewed in Spain on December 29, 2024


    Su diseño es moderno y cómodo, con una pantalla táctil clara de 1,78 pulgadas. Las funciones de llamadas Bluetooth son prácticas, aunque la calidad de sonido es aceptable pero no excelente. El pulsómetro y el monitor de sueño son útiles, aunque no siempre son 100% precisos. Su resistencia al agua (IP68) es un punto fuerte, ideal para nadar o actividades al aire libre. La batería dura entre 3 y 5 días, lo cual es bastante bueno para un dispositivo de este rango. En general, es un buen reloj inteligente para quienes buscan lo básico a un precio accesible.

    Images in this review

    Customer imageCustomer imageCustomer image


Important information

Visible screen diagonal

2" / 5 cm
【User-Friendly Design with AMOLED】Featuring 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 Watch】TOZO 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 Monitoring】TOZO 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 Tracker】With 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 Life】Equipped 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.

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