The Mi Fit Band is a water resistant activity tracker from Chinese manufacturer Xiaomi. It comes as a band, with a shiny silver sensor. You can easily remove the sensor out of the band to charge it.
It automatically tracks activity (steps) and sleep.
The Xiaomi Mi Fit band goes for $ 14.99. With a pricing that sharp, it is probably the cheapest wearable on the market.
The Mi Fit band does a good job designwise: the band looks sleek, the app is very easy to understand and gives you just the right amount of info. However the band is not 100% accurate. It often count too much steps or tracks walking as running.
The Mi Fit band has a battery life of 30 days and can easily be charged to a computer by lifting the sensor out of the band.