I like this app very much, because it's fairly easy to use and it allows for actual ring tones to be used; not just notification tones). However, my biggest issues are that I cannot receive any notifications from the planner if the event was created on my phone's calendar (I'm assuming this is the issue since only half, or less than half, of my total events and tasks do not sound). It also will not sound when I have reminders set for many different times. It's original default reminder is 15 minutes before the event time, but I changed it to be on time and then I would make other reminders if need be. It will only sound at 15 minutes before the event time, no matter what I tell it to do.