 On October 12 , 2011 , iOS 5 was released to various iOS devices , including the first @-@ generation iPad , and was downloadable through iTunes . The update was reported to contain hundreds of new features and tweaks , including Twitter integration , Notification Center and iMessage , which is a feature that allows users to send messages or multimedia files to other users on iOS or OS X , the operating system for Apple computers. iCloud , an iOS app and Apple @-@ provided internet storage service which allows users to sync and backup their user data and settings to / from other devices , was also made available through this update . On June 11 , 2012 it was announced that iOS 6 would not be released for the first @-@ generation iPad , making iOS 5 @.@ 1 @.@ 1 the final operating system officially available for the device . 
