In January, Google said:

“With the launch of CardDAV, it’s now possible to build a seamless sync experience using open protocols (IMAP, CalDAV and CardDAV) for Gmail, Google Calendar and Contacts. We’ll start rolling out this change as planned across all platforms.” (citation)

Yesterday, Google said they would be moving CalDAV support to whitelisted only on September 16, 2013, and that new developers should use their propriatary API (citation).

Removing an entire service, like Google Reader is fair enough, but open standards access, like CalDAV, from products that are used by default with most new phone and tablets sold is low.

Removing Google Reader made me glad I never switched to it. Removing CalDAV support makes me want to renew my efforts not to use Google services beyond search.

Does anyone know if aCal is still read only?