
Released during the summer of 2014, the original Xiaomi Mi Band simply had few LEDs. It was a workhorse that'd go for a month without a charge. Several years later, the second version had a fully-functional screen but not such a secure band. This model had heart-rate monitoring and sleep stats. I liked it a lot. Last winter, we came back to our place in Malaysia and my band had an empty hole. The device had come unseated while we were riding the bus. I immediately replaced it with the third model as I'd become addicted to seeing my daily statistics. I was using it the day after I'd lost the older band. This third model had a larger screen and was better fitted to its band. I just gave it to Jay to wear around to check on steps and heart rates even though he won't' be using the phone app. Jay refuses to bother with a smartphone!
I saw that the price is nearly the same for the Mi Band 4 which came out this summer. Its screen has grown a bit and had gotten a bit colourful. Supposedly, it still goes two or three weeks without needing to be recharged.