Impocall is a really useful and simple app for calendar control.
You can synchronize it with IOS calendar or Google Calendar and also add events directly from the application.
OK, you would say, there are a lot of applications can do this. What about reminders, most of them send you push notification disappearing from your screen in a moment. Otherwise Impocall calls you and the caller name is an event name you wanted to remind!
Impocall helps you not missing the most important events in your life.
-Calendar synchronization fixes