Mi band is a very good fitness band in terms of design and bilt quality.
The band is so helpfull it help you to count your sreps and it also loock after on your sleep and the band is band is made up of mettel and it is water proof and dust proof the band is so cheap in raye only Rs. 800.
It is available in mi.com the band runs on android ans iso in work on android 4.4.4 and above and iso 7 and above the band is soo accurate in counting steps and you need a app called mi fit app