What use to make reminder app?

I want to write reminder. What i need to use? Make service app or just standart app runing in background or another way?

Thanks for replys!

What I really liked about this question is you asked about the idea for the app that you want to implement. You didn't ask for code.

I would suggest that you should make an app which should have a broadcast receiver, but still it should have service that runs in background.

The service will check the current time with your reminder time. A broadcast receiver is required to listen to startup broadcast, because you need to start your app as soon as your handset starts.

Have a look at this.