iCloud offers users 5 GB of free storage which may be upgraded through optional paid plans to up to 12 TB;[2][3] all paid plans include iCloud+ providing additional features.[4] Optional end-to-end encryption has been available since 2022 for all iCloud data, except Calendar, Contacts, and Mail, which rely on legacy sync technologies for compatibility with third-party apps (CalDAV, CardDAV, IMAP).[5][6] As of 2018[update], the service had an estimated 850 million users, up from 782 million users in 2016.[7][8][9]
^'"They Might Be Giants" With A Spanish Accent', With Special Guests Eddy Cue And Craig Federighi, The talk show 146 (32:57) [1]Archived January 24, 2019, at the Wayback Machine February 12, 2016