With its easy-to-use interface, amazing features, and rock-solid stability, iOS is the foundation of iPhone. And even as others try to catch up, the technologies and features built into iOS keep iPhone years ahead.

Elegant and intuitive interface.

You know how to use iPhone from the first time you pick it up. That’s because the revolutionary Multi-Touch interface in iOS was designed for your finger. And the simple, beautiful Home screen is the easiest place to start. From built-in apps to over 500,000 apps available from the App Store. From making a FaceTime call to editing a video with iMovie. Everything you touch is easy, intuitive, and fun.

intuitive, and fun.

Over 200 new features.

The features included with iOS 5 make iPhone even more powerful, innovative, and fun to use. Here are just a few. Learn more about iOS 5

Twitter Integration

Twitter is integrated into iOS 5, so you can sign in once under Settings and begin tweeting directly from Safari, Photos, Camera, YouTube, and Maps. You can even start typing a friend’s Twitter handle and iOS will autocomplete the rest from your contacts.

Photos

Touch up photos right on your iPhone — without the help of photo editing software on a computer. Crop, rotate, enhance, and remove red-eye. Then organize your shots into albums, so you know exactly where your favorites are when the next photo-sharing opportunity presents itself.

Learn more about Photos

Camera Enhancements

Here’s a photo op for your photo ops. Now you can access the Camera app right from the Lock screen. Use grid lines and pinch-to-zoom gestures to get your shot just right. Focus with a tap. Then press the volume-up button and take your photo.

Learn more about Camera

Notification Center

It’s the one place where you’ll see what’s up. iPhone works with your apps to let you know about missed messages, calendar invitations, friend requests, and more. New notifications appear discreetly at the top of your screen. And you can see a summary of recent notifications when you swipe down from the top of any screen.

Learn more about Notification Center

Messages with iMessage

Now you can text it up with fellow iPhone, iPad, and iPod touch users running iOS 5. Messages with iMessage are unlimited.¹ And secure, too. Talk to all your friends or family at once with group messaging. See who’s reading with delivery and read receipts. And if words aren’t enough, send photos, videos, locations, and contacts.

Learn more about Messages

Reminders

You’ll never miss an important deadline, errand, or grocery item thanks to Reminders. Create lists of things to do that you can check off as you go. Even add due dates and locations — pick up mustard at the store after work, for example. Reminders knows exactly when and where to send you an alert.

Learn more about Reminders

The world’s largestcollection of mobile apps.

With thousands of apps in practically every category, iOS is the platform for the world’s largest collection of mobile apps. Apple gives third-party developers a rich set of tools and APIs, and they’ve created apps and games that redefine what a mobile device can do. Where do you find these apps? Just browse the App Store on your iPhone and download them with a tap.
Learn more about apps from the App Store