Reminderz - version 1.3 available on the App Store. Need to have a flexible reminders tool that can snooze reminders? Reminderz does that...
Hoave your reminders listed and grouped. Pause all of them should you need a break ;-)
Use the shortcut button to change the date & time. Specify the defaut snooze time.
You're reminded but do not have the time, snooze it! Change the time of the next reminder.