If you are an iOS developer, it’s crucial to know which version of iOS your device is running.

This information can help you optimize your app for that specific version, as well as identify potential issues that may arise due to compatibility differences. In this article, we will explore the different versions of iOS and their key features, as well as provide some tips on how to check which version you have installed.

What is iOS?

iOS is a mobile operating system developed by Apple Inc. It was first introduced in 2007 with the launch of the iPhone and has since become the most widely used mobile operating system in the world. iOS is known for its user-friendly interface, robust security features, and vast library of apps and games.

Understanding the Different Versions of iOS

As of October 2021, there are currently four versions of iOS: iOS 15, iOS 14, iOS 13, and iOS 12. Each version has its own unique features and capabilities, and it’s important to know which one you have installed on your device in order to optimize your app for that specific version.

iOS 15: The Latest Version of iOS

iOS 15 is the latest version of iOS as of October 2021, and it was released on September 16, 2021. Some of the key features of iOS 15 include:

• Improved battery life due to a new App Library feature that groups all of your apps into different categories
• Enhanced privacy settings that allow you to control which apps have access to your location data and other personal information
• A redesigned Control Center that includes new widgets and customizable controls
• The ability to create and share short videos called QuickTake, as well as the ability to edit and enhance these videos directly on your device

iOS 14: A Popular Version of iOS

iOS 14 is a popular version of iOS that was released on September 16, 2020. Some of the key features of iOS 14 include:

• The ability to hide app icons from the home screen using the App Library feature
• Improved privacy settings that allow you to control which apps have access to your location data and other personal information
• Enhanced widgets that are more customizable and can be placed on different parts of the home screen
• A redesigned Control Center that includes new widgets and customizable controls

iOS 13: An Older Version of iOS

iOS 13 is an older version of iOS that was released on September 19, 2019. Some of the key features of iOS 13 include:

• A redesigned interface with new gestures for navigating between apps and accessing settings
• Improved privacy settings that allow you to control which apps have access to your location data and other personal information
• The ability to create custom folders for your apps, as well as the ability to hide app icons from the home screen using the “Hide Apps” feature
• A new Dark Mode feature that changes the color scheme of your device’s interface to a darker color scheme

iOS 12: The Oldest Version of iOS

iOS 12 is the oldest version of iOS as of October 2021, and it was released on September 17, 2018.