IOS 9

IOS_9_logo

iOS 9

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Native name
Developer	Apple Inc.
Written in
OS family
Working state
Source model	Closed source with open-source components
Initial release	September  16, 2015 (2015-09-16)
Released to manufacturing
General availability
Latest release	9.3.6 / July  22, 2019 (2019-07-22)

iOS 9 is the ninth major release of the iOS mobile operating system developed by Apple Inc., being the successor to iOS 8. It was announced at the company's Worldwide Developers Conference (WWDC) on June 8, 2015, and was released on September 16, 2015. iOS 9 focused on performance improvements, battery life enhancements, and security updates.

Features

iOS 9 introduced several new features and improvements over its predecessor, including:

• Proactive Assistant: An enhancement to Siri, providing contextual information and suggestions based on user habits and usage patterns.
• Multitasking: New multitasking features for the iPad, including Split View, Slide Over, and Picture in Picture.
• Notes: A revamped Notes app with new formatting options, checklists, and the ability to add photos, maps, and web links.
• News: A new Apple News app that aggregates news stories from various sources.
• Maps: Improved Apple Maps with public transit directions and nearby points of interest.
• Wallet: An update to Apple Wallet (formerly Passbook) with support for loyalty cards, credit cards, and debit cards.
• Low Power Mode: A new feature to extend battery life by reducing background activity and performance.
• Enhanced Security: Improved security features, including a six-digit passcode and two-factor authentication.

Performance and Battery Life

iOS 9 was designed to be more efficient, with a smaller installation size and improved performance on older devices. The update aimed to extend battery life through various optimizations and the introduction of Low Power Mode.

Compatibility

iOS 9 was compatible with the following devices:

• iPhone 4S and later
• iPad 2 and later
• iPad Mini and later
• iPod Touch (5th generation) and later

Reception

iOS 9 received generally positive reviews for its performance improvements, new features, and enhanced security. However, some users reported issues with the initial release, which were addressed in subsequent updates.

Related Pages

• iOS
• iOS 8
• iOS 10
• Apple Inc.
• Siri
• Apple Maps
• Apple Wallet
• Apple News

See Also

• List of iOS devices
• History of iOS