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Review Overview
The Vastking Fit M3 is a decent budget smartwatch with no extra perks. Its lightweight metal body may appeal to consumers, but we can't look over the fact that it lacks some of the basic features that competing products provide. Still and all, if you want a basic smartwatch that can handle simple functions, the Vastking Fit M3 is a fine choice.
Design and Build
9/10
Display
8/10
Control
7/10
Battery
9/10
Health, Fitness Tracking
6/10
Companion App
8/10
Value for Money
8/10
If you're familiar with Gadgetbyte, you know how much I love smartwatches and that I never miss a chance to use one. A while ago, Vastking sent us their latest Fit M3 budget smartwatch and I have been testing it ever since. As it costs only USD 60, I'm not expecting anything special here. Let's find out more about the Vastking Fit M3 smartwatch in this review.
Vastking Fit M3 Specifications:
- Body: 4.35 x 35.8 x 8.5mm, 40 grams
- Display: 1.65-inches IPS panel, 240 x 295 pixels
- Design: Metal body, silicon wrist band (20mm)
- Water Resistance Level: IP68 rating
- Compatibility: Android 5.0+ / iOS 9.0
- Companion App: Da Fit (Android | iOS)
- Sensors: 3-axis accelerometer, Heart Rate, Blood Oxygen
- Sports Mode: 8 different modes
- Built-in GPS: Unavailable
- Battery: 200mAh
- Charging: Magnetic charger
Vastking Fit M3 Review:
Design
- Metal body, Silicon wrist band (20mm)
- IP68 certified against dust/water damage
The first thing you will notice about the Vastking Fit M3 is that it has a really attractive design. Needless to say, its look is reminiscent of Apple's smartwatches, but that's not a bad thing really. Besides, I really appreciate how supple the silicon band is, which in turn makes wearing this smartwatch quite comfortable.

Physical controls

Display
- 1.65-inch IPS panel
- 240 x 295 (HD) pixels
For interacting with the smartwatch, you get a 1.65-inch IPS touch screen that features an HD resolution with 240 x 295 pixels resolution. The screen is fairly bright to look at, although it’s better not to expect excellent visibility under direct sunlight. Also, during my time with this watch, I wished it had a better touch response too. I don’t know if it’s because of the relatively slower animation but scrolling through the widgets takes a bit of time and requires a firm touch gesture as well.

Health, Fitness, Sleep Tracking
- Heart rate, SpO2 monitoring
- 8 sports modes in total
With all that out of the way, let’s get to talking about the health tracking features of the Vastking Fit M3. As I said before, this is a budget smartwatch with the most basic of abilities. It can track your steps, calories, heart rate, blood oxygen, alongside a total of 8 types of exercises. This includes walking, running, cycling, skipping, badminton, basketball, football, and swimming.

The basics
Moving on, as with other budget smartwatches, the Vastking Fit M3 doesn't support all-day blood oxygen (SpO2) level tracking. So, you're gonna have to manually record it. Still, I did compare its heart rate and SpO2 readings with that of the Galaxy Watch 4 Classic and found them to be more or less similar.

Connectivity and App
- Bluetooth 5.0, Da Fit app
On the connectivity side, the Vastking Fit M3 features Bluetooth 5.0 and it syncs with your smartphone via the Da Fit app. The app is really basic and has nothing sophisticated to interact with. Its landing page contains all your health stats presented in an easy-to-understand manner. Here, you can simply scroll through stats such as the number of steps, sleep info, exercises, etc. As expected, you'll get more details about your health data on the app rather than on the watch. Here, swiping to the left takes you to the watch face, notifications, and other settings while the last page has your profile and a few other regulatory information.
In-depth
More about the app—it lets you set your daily steps goal and notifies when you’ve achieved certain milestones. Assorted functions like setting alarms, camera shutter, recording water intake, sedentary reminders, etc. are accessible via the app as well.
Battery
- 200mAh cell, magnetic charging
Finally, I have been fairly satisfied with the battery life of the Vastking Fit M3 as well. It packs a 200mAh battery and testing it out with all the functions like continuous heart rate monitoring, 50% brightness, I got good 7-day battery life.

Vastking Fit M3 Review: Conclusion
Wrapping up the review, having used the Vastking Fit M3 for more than 3 weeks, I would say that it's a decent budget smartwatch that gets the fundamentals right. It offers an enticing look but apart from that, its functionalities are pretty much similar to what other budget smartwatches provide—or maybe even less in the case of exercise and sports modes. Still and all, for all its features, the Fit M3 definitely justifies its price. So, if you are looking for a good-looking smartwatch with all the basics under a strict USD 60 budget, I don’t see a reason why you shouldn't consider the Vastking Fit M3. But if you are more serious about health and fitness, I would suggest you add some more cash and get the Honor Band 6 or Huawei Band 6.
Vastking Fit M3 Review: Pros and Cons
Pros
- Metal, lightweight body
- Attractive design
- IP68 dust-water resistance
- Easy-to-use companion app
Cons
- No automatic workout detection
- No build-in navigation feature
Article Last updated: November 23, 2025









