I am looking for a way to turn off alerts on my iOS device for calendars that a shared with me via iCloud.
There seem to be a lot of conversations about this but the terminology gets muddled so I want to be very clear what I am talking about. There are 3 things that are discussed interchangably in a lot of threads for both iOS and OSX so I will clarify between them here.
1.) The iDevice or OSX notification center
2.) The iCal/Calendar in-app notification tray
3.) Event Alerts - the sounds or messages that play to remind you of an upcoming event
I only care about number 3. If someone on my team sets an alert for 30 minutes before an event in her calendar I do not want an alert to play on MY iphone for HER event.
This problem is fixed in OSX mountain lion by going into Calendar->Preferences->Alerts and checking Turn off shared calendar messages in notification center. A similar setting exists in iOS under Setting->Mail, Contacts, Calendars scroll to the bottom and you will see Shared Calendar Alerts. Notice that the terminology does not quite match and neither does the effect. Turning this off gets rid of the sounds and pop-ups that would be generated for #1 (notification center) but does nothing to take care of #3 (event alerts).
It seems like this is an oversight or a misunderstanding internally at Apple due to the vague naming of each of the 3 different items and failure to clarify how each one is handled. There should be a setting somewhere in iOS that has the same effect as the OSX shared calendar alert setting.
For those of you who have seen multiple threads on the #1 and #2 using the settings I listed above will quiet the notifications center pop-ups and noises but the in-app tray will always show changes to all your shared calendar changes. I didn't like this at first but now that it doesn't make any noise I don't mind seeing what my team is up to by scrolling through the tray. It would be nice if I didn't have to click ok to get rid of them though.
The problem with #3 has forced us as a team to try not to set alerts on our calendar items to avoid annoying each other. It defeats the purpose of one of the key features of any calendar app, being reminded of something you need to do. I'm getting a lot of push-back from my team to ditch iCloud because of this issue.