If you have issues with one app that won’t open on your iPad, iPhone or iPod Touch, try uninstalling the app from the device, then reinstalling the app from iTunes or the App Store. However, if your device has developed persistent issues such as failing to open, or if the device exhibits other strange and unusual behavior, perform a full restore of iOS from iTunes to reinstall all default operating system files and apps.

Step 1

Connect the iOS device to your computer with the USB data cable, then launch iTunes.

Step 2

Click the name of your device in the Devices section in the left panel.

Step 3

Click the “Summary” tab in iTunes, then click the “Restore..” option associated with your device. For example, if you are restoring an iPhone, the button is labeled “Restore iPhone.” A confirmation dialog box opens with a warning message.

Step 4

Click the “Restore” button to confirm the restoration. The iTunes program downloads and installs the latest version of iOS to your device. When the restore is finished, the iPhone reboots and displays the Welcome screen.

Step 5

Swipe the orange bar to start the Setup Assistant to configure your device.