YouTip

# Introduction to iOS iOS, formerly known as iPhone OS, is a mobile operating system developed by Apple Inc. The first version of iOS was released in 2007, initially for the iPhone and iPod Touch. The first-generation iPad was launched on January 27, 2010, followed by the iPad Mini in November 2012. iOS devices are released quite frequently; historically, Apple has launched at least one new iPhone and iPad model each year. The iPhone 6s has now been released, following earlier models including the original iPhone, iPhone 3GS, iPhone 4, iPhone 4s, iPhone 5, iPhone 5s, and iPhone 6. Similarly, the iPad has evolved from the first generation through to the fourth generation, along with a special mini version. The iOS SDK has been updated from version 1.0 to 6.0. The latest iOS SDK 6.0 is the only version that supports Xcode 4.5 and higher. Apple provides extensive documentation, enabling developers to find numerous methods and libraries suitable for their deployment targets. In the current version of Xcode, developers can choose deployment targets among iOS 4.3, 5.0, and 6.0. The impact of iOS can be seen through the following features: Facebook and Twitter integration, accelerometer, GPS, high-end processors, camera, Safari browser, powerful APIs, Game Center, in-app purchases, notifications, and a wide range of gestures * Maps * Siri * Facebook and Twitter * Multi-Touch * Accelerometer * GPS * High-performance processors * Camera * Safari browser * Powerful APIs * Game Center * In-app purchases * Notification features * Gestures With the growing number of iPhone and iPad users, developers have significant opportunities to earn revenue through the App Store. A key recent development from Apple is the creation of the App Store, allowing users to purchase applications to enhance their iOS devices. Developers can publish both free and paid apps on the App Store. To develop applications and publish them to the App Store, developers need to enroll in the iOS Developer Program, which costs $99 per year, and requires a Mac running Mountain Lion or later, along with the latest version of Xcode. * * * ## Register as an Apple Developer For users who own Apple devices, having an Apple ID is essential. Becoming a developer also requires an Apple ID. Obtaining an Apple ID is free and involves no additional costs. Having an Apple ID offers the following benefits: * Easy access to development tools; * Access to global developer video conferences; * Invitation to join the iOS developer team; * * * ## Register an Apple ID 1. Click ([https://developer.apple.com/programs/register/](https://developer.apple.com/programs/register/)) and select "Create Apple ID"  2. Enter your personal information 3. Confirm via email to activate your account 4. Download development tools, including Xcode, the iOS Simulator, iOS SDK, and other development resources * * * ## Apply as an App Developer 1. Click ([https://developer.apple.com/programs/ios/](https: