Top positive review
The best, most functional and least expensive fitness band in the world. I love my Mi Band 4! :D
Reviewed in the United States on December 7, 2019
In my opinion, this is the best and least expensive "smart watch" (fitness band) in the world world and at $35 it's impossible to be beaten.
This thing is on my wrist 24/7 (unless I'm taking a shower).
I'll get into the details of what makes this band so great, but keep in mind I've owned its oldest sibling, the Mi Fit Band 2 for over 2 years, so I've been enjoying most of these features for a long time. The Mi Fit Band 4 just made things better and more enjoyable.
You can easily see the time, date, step count, battery life and bluetooth connectivity on the colorful and bright display.
Having the option for screen brightness is the best thing for me as I ended up having to replace my $20, almost 3 year old, fully functional Mi Band 2 because I could no longer see its display in well lit environments - Xiaomi did a firmware update for it and that caused the display to get way too dim forever. I am still very upset about that. However, I'm glad I decided to buy the Band 4 because it is so much better than the Band 2 in so many ways.
There's tons of customizable watch faces on the internet. Use one of those apps I've mentioned earlier to download and install them to your band. It's really cool.
Brightness control from within the band menu is something I use a lot and helps me save / optimize battery. It would be nice if they had implemented an automatic brightness by using a brightness/lumen sensor but that's probably a feature for future iterations if this band.
This is the best alarm clock in the world!
Just set up a time and and frequency and this band will gently wake you up with a "nudge" (vibration) at the scheduled time.
No more annoying alarm sounds in the morning for me. This is simply my favorite feature of this band.
I also programmed it to vibrate when I have a phone call. It also displays who the caller is as it vibrates. It's really awesome!
No more annoying ringers on my phone! Yay!!!
You can also sync it with your favorite texting app such as WhatsApp, Facebook Messenger and read incoming messages directly on the band. I don't use that feature though.
I love the sleep monitoring function as well, deep and light sleep are accurately registered. However, I believe that sleep quality analysis is just baloney.
Another great feature (that FitBit does not let you do) is to use the continuous heart rate function and directly pair it with Android apps such as Runtastic (now Adidas...) and Runtastic Mountain Bike Pro GPS Tracker. It's a little tricky as you'll need Tools & Mi Band or Notify & Fitness for Mi Band, plus one of the GPS + HRM apps that I've mentioned earlier to make it all work together, but it's worth it.
I was able to get it all working with the older version (3.0.2) of MTB Pro app, then I upgraded the app to the latest version available on the Google Play Store and still kept the HRM functionality.
It will probably be a hit and miss for most people that aren't too tech savvy. But at least now you know this band's HRM works with 3rd party apps. That was you'll be able to store your workouts on the internet and see it in detail on your browser. Using 3rd party GPS HRM fitness tracker apps GPS is so much better than the built in fitness tracker found in the Mi Fit app (for tracking workouts the *Mi Fit app* is pure garbage).
Directly from this band's tiny colorful display, you can easily control (fast forward, rewind, play / pause, and even increase the volume!) the music you're listening to on your smartphone. You can also control your streamed media (smart TV or Google Chromecast) as well.
There's also stopwatch and timer functions built in to the band itself. You don't need the app to use those features.
On screen weather is included but I hardly ever use it.
The band will also give you random, useless weather broadcast (wind, flood, low temperature) alerts. I don't like them and wish I could disable them completely.
If you know how to use this product well, your battery will last longer than 30 days in one charge.
I hardly used the heart rate function this past month, so that's probably why my first charge lasted me exactly 31 days.
However, it's important to note that ever since I got my Mi Band 4, I've had two very long firmware updates that used up 6% of battery on each update (12% total), so technically, the battery should have lasted more than 31 days. Mine drains just shy of 3% of battery a day. So 34 to 35 days in one charge could have been possible to achieve.
All in all, I'm extremely happy with this product and I highly recommend it.
Enjoy it! :D