This alarm app is construed for a changing shift system. You can put in your work period. This periode will be continued, so that the alarm wakes you up for example for every morning shift. Furthermore you can choose single days on witch the alarm should ring or not. With that function you can put in your holidays for example. Besides there are some interesting options available: name the single alarms, turn on and off the vibration, choose a sound from iTunes or iCloud, set and increase volume, snooze interval and number