We may receive a commission on purchases made from links. Given the number of wearables on the market, it's hard to keep up with all of the different varieties. Smartwatches are the first thing that ...

Xiaomi's original Mi Band was a catalyst for affordable fitness trackers. The lineup didn't even have a display intially (it got one in 2016 with the Mi Band 2), or a heart rate sensor - it was as ...