Let the timex ironman move x20 mid size activity tracker with 3d accelerometer technology do the hard work as well as motive you to stay active track your daily steps distance calories sleep time and lightdeep sleep periods with the workout and sleep modes and evaluate all the data on the timex app connect it to your ios or android smartphone and receive call and text alerts in addition to vibration notifications when you hit your goals which you can set on the app the find phone functi