Please suggest a backend and mobile solution to enable the schedule of events and activites for each users in our backend system to be synchronized to users' iOS and Android device calendar. Due to privacy issue, authentication is requried for subscribing the user's own calendar from mobile device. The schedule of events in mobile client should not be editable. Thanks.
@izzy
suffices for a ping :) I'd use something based on CalDAV. There are good clients for Android (DAVDroid, now named DAVx5 is what I use and am happy with). Cannot tell for iOS though.