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Timestamps:
00:00 Background
01:37 10 Things to Know
03:55 Heart Rate Test Spinning
07:41 Heart Rate Test Cycling
10:15 Heart Rate Test Weight Lifting
11:07 Sleep Stage Testing
15:13 Sleep Stage Test Overview
16:29 SpO2 Test
18:27 Step Test
20:15 Potential Issue with the Mi Band 7
20:39 Health Tracking Conclusions
21:28 Final Thoughts
Introduction:
This is the new Mi Band 7, which still resembles its predecessor, but now has a larger 1.62-inch always-on AMOLED display. However, as impressive as that beautiful and bright display is, can the new Mi Band 7 reliably measure and track your health metrics? Over the last few days I have done different scientific tests on this new Mi Band 7, and I found it seems to be good at some things, but also struggles with some specific measurements. Now, in other videos I have shown that the previous generation, the Mi Band 6, was pretty bad when it was launched, but it improved quite drastically with firmware updates. Let’s see if this new Mi Band 7 also needs some time to get good performance, or if it is already quite good from the start. In this video, I will do some initial scientific testing of the heart rate measurements, sleep tracking, oxygen saturation measurements and step counting of the Mi Band 7. Now, this is a first set of tests, as I just received the device this week, and a full scientific review will follow as I do more detailed tests over the next few weeks.
The first thing you will notice about the new Mi Band is that it’s bigger, with a 1.62-inch Always-on AMOLED display compared to the 1.56-inch display of the Mi Band 6, which according to Xiaomi, increases the viewing area by 25%. However, the pixel density remains the same as before at 326 PPI. Xiaomi also created new icons, new effects, and restyled data visuals to go with this larger display. The Mi Band 7 is said to have 120 sports modes, and now has continuous blood oxygen monitoring and low SpO2 alerts. In addition, the Mi Band 7 also has all-day heart rate monitoring, sleep monitoring and also stress monitoring, which as you might know, I am generally quite skeptical of. The Mi Band 7 is water resistant up to 5 atmospheres, similar to the Mi Band 6, which means it can withstand water pressures equivalent to a depth of 50 meters. The main thing that is lacking is that it still doesn’t have built-in GPS. Xiaomi says that the Mi Band 7 has a battery life of 14 days with regular usage, however, I haven’t been able to validate this yet. Also, a lot of the more advanced features, like always on display, continuous SpO2 measurements and stress monitoring will drain the battery faster. It is a bit unclear what the band will sell for in the US and Europe, but it will probably be around 50 dollars. Now, I was able to connect the Mi Band 7 to two different apps on iOS: Mi Fitness and Zepp Life. I ended up using Zepp life, because that was the only way I was able to export my exercises to Strava. I had to do it indirectly though, by logging into the normal Zepp app with the same account.