A quick question on application design. I was wonder if any of you know roughly how the notification/reminder system in the application "Day One" works?

Basically I think it uses UILocalNotifications, it has a feature which helps remind users to use the app, by setting a reminder with a given frequency.

I am wondering how this was implemented?

I don't think it can be that"Day One" sets a constant reocurring UILocalnotication - as surely if the app was deleted this would continue to bug users and cause issues?

Maybe they use push notificaitons?