Performance optimizations were made in order to speed up common tasks across all supported iOS devices. Tests done by Apple on an iPhone 6 Plus showed apps launching 40% faster, the system keyboard activating 50% faster, and the camera opening 70% faster compared to iOS 11.
Screen Time is a new feature in iOS 12 that records the amount of time a user spent on the device. The feature also displays the amount of time the user used particular apps, the amount of time the user used particular categories of apps (such as games), and the number of notifications the user received.
Screen Time also provides blocking features to limit usage of apps (with time limits) or set other restrictions such as on purchases or explicit content. It replaces Restrictions in the iOS Settings app, but can also be used by adults to limit their own usage. These features can be used with or without a passcode. Without setting a passcode, the limits can easily be bypassed but may serve as a useful reminder of usage goals.
A dedicated application in iOS 12 allows users to set up Shortcuts, automated actions that the user can ask Siri to perform. Using the Shortcuts app, a user can create a phrase and type in the action they want Siri to do for them. Once they tell the phrase to Siri, Siri will automatically do the task they set for it in the Shortcuts app. The Shortcuts app replaces the Workflow app that Apple acquired in March 2017.
ARKit now allows users to share their view with other iOS 12-supported devices. ARKit 2 additionally allows full 2D image tracking and incorporates the ability to detect 3D objects.
The Voice Memos and Stocks apps are now available for iPads.
On December 14, 2020, Apple released iOS 12.5, which includes the Exposure Notification API (backported from iOS 13) that provides access to the privacy-preserving contact tracing system that Apple have developed jointly with Google. This is provided to support digital contact tracing which came to light during the COVID-19 pandemic.
iOS 12.1, released on October 30, 2018, adds the ability to include up to 32 people in a FaceTime conversation. This feature is only supported with video by devices with the Apple A8X or Apple A9 chip or later; it is only supported for audio on iPhone 5s, iPhone 6, and iPhone 6 Plus, and is not available at all on iPad Mini 2, iPad Mini 3, and iPad Air (1st generation). Group FaceTime was disabled on January 28, 2019, due to a software bug that allowed calls to be answered by the caller rather than the recipient, allowing video and audio to be transmitted unless the call was declined. The functionality got restored on February 7, 2019, with the release of iOS 12.1.4. Group FaceTime remains disabled on devices running iOS 12 that are affected by the bug.
While the "Photos" and "Albums" tabs received only a few cosmetic changes, the "Search" tab includes new Artificial Intelligence and Machine Learning features which show the user photos by place and categories (e.g. animals, cars, objects).
Notifications are now grouped by application and have a "manage" button to turn off notifications for that app or to deliver them quietly right from the Notification Center without having to go into the Settings application.
Do Not Disturb gives users more options for automation. Users can hide notifications indefinitely or scheduled like previously, but can also hide notifications for 1 hour, until a time of day, until leaving a location, or until the end of a scheduled event in Calendar.
Voice Memos and Stocks are supported on iPad, and have a newer design. Stocks was integrated with Apple News to show financial and other related news.
A FaceTime issue impacting several versions of iOS 12 (versions 12.1–12.1.3) allowed users to call someone via FaceTime and hear the audio coming from their phone before answering the call, before the bug was fixed in iOS 12.1.4.
All devices that support iOS 11 support iOS 12. However, devices with 1 GB of RAM, A7 and certain A8 chip processors have limited support, which include the iPhone 5s, iPhone 6 & 6 Plus, iPod Touch (6th generation), iPad Air (1st generation), iPad Mini 2 and iPad Mini 3.
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Animoji, Memoji, AR app support, the Measure app, and Message photo filters are not available on devices with less than 2 GB of RAM and older than the iPad Air 2.
iPhone XR only /wiki/IPhone_XR
iPhone XS, iPhone XS Max and iPhone XR only /wiki/IPhone_XS
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iPhone XR only /wiki/IPhone_XR
Re-release of 12.1 for iPhone XR only on November 6, 2018 /wiki/IPhone_XR
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Re-release of 12.1 for iPhone XR only on November 6, 2018 /wiki/IPhone_XR
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Re-release of 12.1.2 for all iPhones on December 20, 2018
Re-release of 12.1.2 for all iPhones on December 20, 2018
iPhone XS, iPhone XS Max, iPhone XR and iPad Pro (3rd generation) only /wiki/IPhone_XS
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Clover, Juli (13 May 2019). "Apple Releases iOS 12.3 With New TV App and Channels Feature". www.macrumors.com. Archived from the original on 2019-07-23. Retrieved 2019-08-27. https://www.macrumors.com/2019/05/13/apple-releases-ios-12-3/
iPod Touch (7th generation) only /wiki/IPod_Touch_(7th_generation)
iPod Touch (7th generation) only /wiki/IPod_Touch_(7th_generation)
Clover, Juli (22 July 2019). "Apple Releases iOS 12.4 With New Wireless Data Migration When Setting Up a New iPhone and Apple News+ Improvements". www.macrumors.com. Archived from the original on 2019-08-27. Retrieved 2019-08-27. https://www.macrumors.com/2019/07/22/apple-releasing-ios-12-4-today/
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iOS 12.4.2 firmware was not "officially" released for the iPhone 6S/6S Plus, iPhone SE (1st generation), iPad Air 2, and iPad mini 4, but the firmware fully supported these devices and it was possible for them to update to it. /wiki/IPhone_6S
Juli Clover (September 26, 2019). "Apple Releases iOS 12.4.2 Update for Older iPhones and iPads". MacRumors. Archived from the original on September 26, 2019. Retrieved September 26, 2019. https://www.macrumors.com/2019/09/26/apple-releases-ios-12-4-2-update/
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"About the security content of iOS 12.4.4". December 10, 2019. Archived from the original on December 10, 2019. Retrieved December 10, 2019. https://support.apple.com/en-us/HT210787
Juli Clover (January 28, 2020). "Apple Releases iOS and iPadOS 13.3.1 With Toggle for Turning Off U1 Chip in Latest iPhones". MacRumors. Archived from the original on January 29, 2020. Retrieved January 28, 2020. Apple has also released an iOS 12.4.5 update for older devices. https://www.macrumors.com/2020/01/28/apple-releases-ios-13-3-1/
Juli Clover (March 24, 2019). "Apple Releases iOS and iPadOS 13.4 With New Mail Toolbar, iCloud Folder Sharing, Trackpad Support for iPad and More". MacRumors. Archived from the original on April 10, 2020. Retrieved March 24, 2020. https://www.macrumors.com/2020/03/24/apple-releases-ios-13-4/
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Juli Clover (July 15, 2020). "Apple Releases iOS 13.6 With Car Key, Toggle to Turn Off Automatic Update Downloads, Audio Apple News+ Stories and More". MacRumors. Archived from the original on July 15, 2020. Retrieved July 15, 2020. https://www.macrumors.com/2020/07/15/apple-releases-ios-13-6/
Juli Clover (November 5, 2020). "Apple Releases iOS 14.2 and iPadOS 14.2 With New Emoji, Control Center Music Recognition, Intercom, Wallpapers and More". MacRumors. Archived from the original on November 5, 2020. Retrieved November 5, 2020. https://www.macrumors.com/2020/11/05/apple-releases-ios-14-2/
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Juli Clover (January 11, 2021). "Apple Releases iOS 12.5.1 With Exposure Notifications Bug Fix for Older iPhones". MacRumors. Archived from the original on January 11, 2021. Retrieved January 11, 2021. https://www.macrumors.com/2021/01/11/ios-12-5-1-exposure-notification-bug-fix/
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"About the security content of iOS 12.5.3". Apple Support. 3 May 2021. Retrieved 2023-01-24. https://support.apple.com/en-us/HT212341
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