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Quote:
Originally Posted by jjlucsy View Post
iOS doesn't allow a program to run in the background, therefore it has no way to update itself. That, and OmniGroup doesn't provide a backend server that can push badge updates to the user. So this is expected behavior, unfortunately.
Thanks for your reply!

I am wondering whether local notification can do this job? As far as I know, there are apps update badge status themselves without internet connection.