If an app on your iPhone stops responding, closes unexpectedly, or won’t open, one of the possible solutions is to force the app to close and reopen the app. This can help clear any temporary issues that may cause the app to malfunction. To force the app to close, you need to swipe up from the bottom of the screen until all running app cards appear, then swipe up on the app card to quit the app. To reopen the app, you need to tap the app icon on the Home Screen or in the App Library. The other options are not recommended as the first steps to troubleshoot an unresponsive app, as they may have unwanted consequences or not address the root cause of the problem.

Deleting the app and redownloading it from the App Store may result in losing data that was stored in the app, and it may not fix the problem if the app is incompatible with your device or software version.

Resetting all settings will erase all your customized settings, such as network, privacy, accessibility, and general preferences, and restore them to the default values. This may not fix the problem if the app is corrupted or has a bug.

Restarting the device may help resolve some minor glitches, but it may not fix the problem if the app is conflicting with another app or service, or if the app needs an update. References:

Apple Device Support Exam Prep Guide, page 9

If an app on your iPhone or iPad stops responding, closes unexpectedly, or won’t open

According to the Apple Device Support Reference Materials, the steps to put an iPhone in recovery mode are:

Plug your iPhone in to your computer using your USB to Lightning cable1.

On a Mac with macOS Catalina or later, open the Finder. On a Mac with macOS Mojave or earlier, or on a PC, open iTunes1.

Quickly press and release the Volume Up button, then quickly press and release the Volume Down button, and then press and hold the Side (or Power) button until the recovery mode screen pops up12. It won’t happen instantly, so hang on for at least 15 seconds or so before you try it again2.

Locate your device on your computer and choose the option to Update or Restore1.

These steps apply to all iPhones manufactured since 2017, including iPhone 8 or later, iPhone SE (2nd and 3rd generations), and iPhone 12 or later2. For older models, such as iPhone 7 or earlier, the steps may vary slightly1. References: 1: If you can’t update or restore your iPhone or iPod touch - Apple Support 2: How to put your iPhone or iPad into recovery mode | iMore

Reference Mode is a display mode for professional content creation workflows, like color grading, editing, and content review, where accurate colors and consistent image quality arecritical. Reference Mode enables the 12.9-inch iPad Pro with Liquid Retina XDR display to deliver reference color for popular color standards and video formats, such as BT.709, sRGB, HDR10, Dolby Vision, and more. It also disables all dynamic display adjustments for ambient surround, such as True Tone, Auto-Brightness, and Night Shift. Guillermo can use Reference Mode to match the color requirements of his workflow and ensure that his marketing materials and color grading are accurate and consistent. He can also use Reference Mode with Sidecar to use his iPad Pro as a secondary reference display for his Mac. References: Use Reference Mode on your iPad Pro, iPadOS 16: These are the new features exclusive to M1 iPads