After having tried a few smart bracelets, some that exceed 100 euros, I can say that the Xiaomi Mi Band It's the best buy of all, for the price/quality ratio. It does almost the same thing as a bracelet that costs ten times more. Of course, it's not the best bracelet if you want monitor naps, or if you are a day sleeper.
Quantifying bracelets
We end up saying that they are smart bracelets, although in reality they are quantifying braceletsHowever, technology companies are working hard to make these bracelets smart. For example, they are adding features such as the ability to detect when we sleepThis is really useful, as sleep monitoring is done automatically, without us having to tell the bracelet that we're going to sleep. This is precisely something that is often forgotten, which is why it's so useful that the bracelet can automatically detect when we're going to sleep. Xiaomi Mi Band It has that function, for example, and so do the vast majority of bracelets, such as the Fitbit Charge, or the Misfit Flash and Shine. However, at least in the case of the Xiaomi Mi Band, there is a problem, and that is that does not monitor naps.
In addition, the band is compatible with the 24-hour sleep monitoring and automatically classifies periods: sleep of 3 hours or more is recorded as prolonged sleep, and the one of less than 3 hours as sporadic naps; periods of less than 20 minutes are not recorded. When the high-precision monitoring (sleep assistant) can estimate phases like REM, although reduces battery life. Both on the bracelet and in the app you can consult the stages of sleep.

Display method: The band displays the main record of the day and, after synchronizing with the mobile, in the Sleep section of the app you can see historical data by day, week, month and year, with the distribution of total sleep, time awake, light and deep sleep, and even the state at each time point in the period. Keep in mind that very quiet activities (watching TV, reading, lying down with your phone) can generate false positives.
Only at preset times
The bracelet is programmed to be able to recognize when we are going to sleep as long as it is within preset limits. If we take a nap after eating, the bracelet will not know that we have gone to sleep, and the same happens if we are one of those who sleep in the morning because we have to work at night. It is even possible that the bracelet is not able to know if we are going to sleep when it is very late, such as 4 in the morning. The objective of this is that the bracelet does not make a mistake during the day, if we take it off, or if we leave the wrist very calm, and believe that we are sleeping, when we are just sitting quietly, or we have simply taken it off. It is not a unique problem of the Xiaomi Mi BandWell, this is also the case with the Misfit Shine, for example, a much more expensive bracelet, although in this case, it allows us to configure it so that the user can be told when they are going to sleep. In any case, it is a detail worth keeping in mind, especially for users who work at night, since the sleep monitoring function cannot be used by them. Even so, it is the best possible purchase if you are looking for a quantifying bracelet, because as we have already said, it does almost the same thing as the others, but costs many times less.
With the Mi Band, nightly records are validated if your rest falls between 18:00 and 11:00 hrs. the next day (and usually requires some stretch between 00:00 and 06:00 hrs.), while naps are contemplated between 11:00 and 18:00 hrs.. In order for naps to be recorded, you must activate automatic heart rate + assisted sleep in the app; if it lasts less than 20 minutes, will not be saved.
- Opens ZeppLife (or Mi Fit if you still use it).
- Profile > your bracelet in My devices.
- Sign in health monitoring o heart rate detection.
- Active High-precision sleep monitoring and automatic heart rate.
Common problems and quick solutions
- Belt poorly adjusted: If it is loose or incorrectly positioned, the PPG sensor will fail. Adjust and position the sensor properly. glued to the wrist; if you have tattoos under the sensor, try on the other hand.
- A lot of movement or interruptions: Getting up in the middle of the night or moving around excessively can disrupt the recording, and the band may consider you to have finished sleeping, not resuming it later. It is a algorithm limitation based on movement and pulse.
- Lack of permissions/sync: enables the background synchronization from Zepp Life/Mi Fit in Settings > Apps > Battery > Without restrictions.
- Firmware and app: Keep the band and the app updatedIf it gets worse after an update, try unlink and relink the bracelet.
- Other apps in conflict: Prevents multiple health apps from recording at the same time. Prioritizes the official app and uninstall redundant tests.
- Insufficient duration: if the nap lasts less than 20 minutes It is not saved; between 20 min and 3 h it is labeled as nap; more than 3 h, as prolonged sleep.
- Realistic expectations: is not a medical device; it offers a estimate Useful for routines, but with a margin of error. The latest models have improved sensors and algorithms compared to previous generations.
- Possible defect: If all else fails, there could be a hardware failure; contact Xiaomi support for review or replacement.
For users with atypical schedules (night shifts), the combination of high accuracy, the correct time window and a good fit greatly improve detection. Avoid long periods of stillness without sleep (television, reading) just before bedtime to reduce false positives and always sync the data in the app to see the history by day, week, month and year.
If you are looking for a quantifying bracelet with a good price and solid features, the Xiaomi Mi Band It's still a great buy - it does almost the same thing as the others for a lot less, with the exception that the nap detection It depends on windows, minimum duration, and high-precision settings. With the tips above, your sleep log is usually more than enough to improve routines and understand your sleep.
