As far as the hardware is concerned, Xiaomi provides improved performance and features with the S400. However, as far as the software is concerned, I think that the app it connects to, although it provides the necessary information, is nevertheless inferior to the older Zepp and Zepp Life apps, which, despite providing more or less the same information, were superior in terms of usability

My girlfriend absolutely loves it. Nice app that keeps a history of the measurements. The only drawback is the heart rate monitor, which shows whatever it wants. It always gives a reading of 100 to 120 beats, even at rest.

Very good, especially for the money. Personally, I had a Bosch before and it gives the same measurements. Now, as for how much accuracy it has... it's not the kind of machine you take to the nutritionist to get measured. It's an affordable scale. It does its job. It also has an app that stores the data.

Good for getting an idea and seeing whether you're making progress, but I think the measurements are not accurate. On a more accurate scale at a nutritionist's, my body fat was four units lower.

As for the weight, it shows correctly.
In the Xiaomi Home app it keeps a weight record, as well as for each family member, and it also has an option to measure weight for guests.
For the other measurements, body water, fat, etc., there it gets confusing and it even says that it is not 100% accurate; if you want to do the MOST ACCURATE body fat measurement, go to a nutritionist ...

It is worth its money.

The measurements are at the very least unreliable, but it shows now, but in a minute in the next measurement.

Measurements for body fat analysis etc.: all invalid! (A measurement was made with a medical device and there are serious discrepancies!)
It measures weight just fine, but there are also cheaper ones that do the same job!

Very good, but I would prefer it to display the additional measurements (BMI, etc.) on the screen and not necessarily only through the mobile app.

The weight measurement is consistently low. However, the other measurements are not measurements; they are just calculations without any result. I would not buy it again.

Instant measurement, accurate and generally sturdy construction. The only thing I’m not sure about is whether it measures heart rate correctly. Of course, it’s very important to place the foot correctly, without socks or shoes. Overall, a beautiful device at a great price. It connects easily to an app and keeps a history with user profiles, which is very useful.

Unfortunately, it’s not a good scale. I tried weighing myself by “telling” the app that I’m a man and then that I’m a woman, and the results were completely opposite. I don’t think it calculates body fat, muscle mass, etc. in any legitimate way. I don’t know what I was expecting from a €20 scale anyway! But even the weight itself will show a 2 kg difference depending on where on the floor I place it (everywhere is a level floor, just different tiles, etc.). Do yourself a favor and get a slightly more accurate one that may be more trustworthy.

There is an app and it also shows body fat and related metrics like a scale. It has a deviation from professional ones, but it is worth the money

It seems to be accurate in kilos now, for fat measurement you need a professional machine... on the downside it has an issue with connectivity in the app

not accurate because it can't measure muscle mass and it gives you the wrong result, okay it does the job for the money

It does the job, a simple scale. I think the body comp is based on the average because it is quite off by several kilos in the ratio of muscle mass and fat

Excellent, I use it every day as soon as I wake up. Run your legs a little before stepping on it, they say the measurement is more accurate. Fat and visceral fat are very important, as are water percentage and muscle mass. Now, if you compare the measurements with a professional scale, I don't know if it will give the same readings, but at least you can see the fluctuations in your measurements from one day to the next.

Very convenient to use. It also connects to Apple easily. It gives you a lot of details and it really is worth the money.

4 stars because:
- The fat and muscle mass measurements have significant deviation from those on corresponding professional scales.
- The batteries included were almost empty.

Generally very user-friendly and pleasant to "play" with.
As for the indications, I don't have a point of comparison but I think that if you monitor the voltage you can get your job done

Easy connectivity and useful for someone who wants to monitor their progress on a consistent weekly basis.

Pros:
Connectivity
Weight Tracking
Design, Quality

Cons:
Very large deviation in the other measurements

Very good construction and quality. The features it offers are very useful.

For a scale in this budget, it has very good measurement on the kilos it measures and I assume also on the pulses. I weigh myself daily and I know my deviations after resistance training and carbohydrate consumption, and it does just fine.
Where it falls short is in all the other measurements, where I should note that you need to have the Xiaomi app open at the same time for it to record them.
In body fat measurement, it shows me at least 2.5% higher than I actually am, and I know this because I visit a nutritionist often and get measured there as well.
Nevertheless, I should emphasize that none of these 2-point measurement devices will ever have the accuracy of 4-point measurements, because quite simply they cannot record all the "components" of our body in order to produce valid measurements.

Perfect! It's the scale I dreamed of. It weighs accurately, keeps a history, and its purchase is worth it.

VFM with quite good accuracy in weight, with some losses in the other measurements but at acceptable levels.

Apart from the weight, all other measurements are not accurate. I would say its accuracy is at 75%.
3/5 stars and that's generous. I wouldn't buy it again.

Works great. Don't really care about the Bluetooth connection to the app and what the app says. It can be used without it, so i mostly do that.

Very good. The weight measurements compared to a nutritionist's scale showed no deviation, while the body fat measurement had about a 10% difference, but that's reasonable.

It broke down on me within 4 months. It shows me incorrect readings with a range of 15 kilos. Even though I have reset it and always wait for it to show 0.0, still nothing.