|Release date||April 3, 20101st generation)(|
|Units sold||500 million as of 2020[update]|
|Operating system||iOS (2010–2019)|
|Connectivity||WiFi and cellular|
|Related||iPhone, iPod Touch (comparison)|
|This article is part of a series on the|
|List of iPad models|
The iPad is a brand of iOS and iPadOS-based tablet computers that are developed by Apple Inc. The iPad was conceived before the related iPhone but the iPhone was developed and released first. Speculation about the development, operating system, and release of the original iPad began in 2002 prior to its introduction on January 20, 2010. The iPad range consists of the original iPad lineup and the flagship products iPad Mini, iPad Air, and iPad Pro.
The iPhone's iOS operating system (OS) was initially used for the iPad but in September 2019, its OS was switched to a fork of iOS called iPadOS that has better support for the device's hardware and its user interface is customized for the tablets' larger screens. The iPad's App Store is subject to application and content approval. Many older devices are susceptible to jailbreaking, which circumvents these restrictions. The original iPad was well-received for its software and was recognized as one of the most-influential inventions of 2010. As of the third quarter of 2021, iPad had a market share of 34.6%; beside personal use, the iPad is used in the business, education, healthcare, and technology sectors. There are two variants of iPad; one has only Wi-Fi and one has support for cellular networks. Accessories include the Apple Pencil, Smart Case, Smart Keyboard, Smart Keyboard Folio, Magic Keyboard, and several adapters.