IOS 5

iOS 5 is the fifth version of iOS that was released on 12 October 2011. It was first announced at WWDC 2011 on 6 June 2011. There are seven betas of iOS 5.0 that have been released.

Setup
Devices can now be set up, activated, and configured without connecting to a computer.

Siri
Siri, Apple's voice assistant, has been added with this release for the iPhone 4S.

Notifications

 * Notification Center has been added, which displays recent notifications.
 * Notifications will now briefly appear at the top of the screen as banners.
 * Notifications can now be viewed and opened from Lock Screen.

Camera and Photos

 * A shortcut to the Camera app has been added to the lock screen, which can be accessed by double-clicking the home button.
 * The volume buttons can now be used to take a picture.
 * An option to enable grid lines has been added.
 * Camera face detection now highlights all faces.
 * Editing tools have been added to the Photos apps. These include:
 * One-tap enhancement
 * Crop and rotate
 * Red-eye removal

iMessages
The new iMessages app has several new features, such as:


 * Read receipts
 * Group messages
 * Encrypted messages
 * Unlimited text, photo, and video messages
 * Wi-Fi support

Reminders
The Reminders app was added which allows users to create lists of tasks with date-based or location-based alerts.

iCloud
iCloud has been added, which replaces MobileMe.


 * Music, Photos, Documents, Apps, Contacts, and more can be synced in iCloud.
 * Apps and Books now have purchase history and can be automatically updated.

Newsstand
The Newsstand app was added. It is a special folder where the user's purchased newspapers and magazines are shown on a wooden shelf. New issues were downloaded automatically.

Settings

 * System updates can now be installed via Settings.
 * Several new accessibility options have been added.

iPad

 * The "Pinch to Close" gesture has been added to the iPad 2.
 * The keyboard can be undocked from the bottom of the screen and could be split into two half-keyboards.

Miscellaneous

 * The iPod app was replaced by separate Music and Videos apps.
 * Text in Mail can now be formatted with bold, italic, or underlines.
 * Personal photos can now be used for Game Center profiles.
 * System-wide integration with Twitter has been added.