Tasker - it's just a very functional scheduler system Android. Depending on certain events he allows to perform the same or a different detsva. Considered the following objects: an application,the time, the day, the state of equipment and even software, event, shortcut,just a widget, the timer. There are 125 built-in actions. Its only fault is that for those who use it only for the first time the interface did not seem very clear.