If you’re looking for a real sync solution you may try our app DAVdroid. You need to set up a CalDAV server first. Then you will be able to synchronize your calendars in two way. DAVdroid is open source and it published under GPL and we also sell it in the Google Play store, because it was and is very hard work to write and maintain it.
Calendar Specific Sync Intervals
It would be good to be able to set some calendars with a different sync time than the default.
All calendars are not necessarily equal!!
We wanted to keep it simple. But you can always create a second account and select only the calendar you want with a different sync interval (as a workaround)!
@devvv4ever ok confused. How do I set up an account let alone a second one. I know I have accounts in DavDroid which I am using but not even seen this in ICSDroid.
Also I just spotted a problem with local ICS files. You cannot change the colour of a file/// calendar but you can for a web hosted one!!
Ah, sorry I thought I was in the DAVdroid forum… With ICSdroid you can always set the minimum interval that you need for one calendar, the others only get updated when there are changes on the server so there is no unneeded traffic. See here because we’re often asked about it: