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iCloud Storage

iCloud Storage APIs enable your apps to store user documents and key value data and wirelessly push any changes to all your user's computers and devices at the same time — automatically. See how iCloud can help you create compelling new functionality in your apps.

Newsstand

Publish the latest issues of your magazines and newspapers directly to Newsstand, the new folder on the Home Screen. Newsstand Kit provides everything you need to update new issues in the background, so you can always present the most recent cover art. Apps built for Newsstand use In-App Purchase subscriptions, making it easy for users to manage their auto-renewable subscriptions. And it's now possible to provision your app for In-App Purchase within Xcode.

Twitter Integration

Tweet directly from your apps using the new Tweet sheet. It provides all of the features available to built-in apps, including URL shortening, attaching current location, character count and hosting photos on Twitter. And if your app is a Twitter client, it's easy to tie into the single sign-on service using the Twitter APIs. It's even possible to migrate existing accounts to iOS.

AirPlay

Introduced in iOS 4.2, AirPlay streams video, audio and photos to Apple TV. With iOS 5, it's now possible to wirelessly mirror everything on your iPad 2 to an HDTV via Apple TV. Your apps are mirrored automatically. With additional APIs your app can display different content on each of the HDTV and the iPad 2 screens. In iOS 5, apps built with AV Foundation can now stream video and audio content through AirPlay, and AirPlay now supports encrypted streams delivered via HTTP Live Streaming.

Game Center is taking multi-player gaming on iOS one step further with the addition of turned-base game support. With turn-based games, players can play when they want and Game Center will manage each turn for them. Game Center will automatically send the next player a push notification via Notification Center and manage multiple game sessions. Other developer additions to Game Center include, adding players to existing multi-player games, displaying achievement notification banners, and support for distinct icons for each leaderboard.

iMessage

iMessage is a new messaging service that works between all iOS 5 users over Wi-Fi and 3G. iMessages are automatically pushed to all iOS 5 devices, making it easy to maintain one conversation across iPhone, iPad and iPod touch. In iOS 5 SDK, the Message sheet now supports the iMessage service, so you can start individual or group text conversations from within your app.

PC Free

iOS 5 includes a host of features that give users the power, freedom, and flexibility to use their iOS devices without a Mac or PC. Expand the functionality of your apps and remove the need for users to access a PC. Take advantage of iCloud Storage to store documents and user data, so they are updated automatically and users can access them from all of their devices.