A common problem that occurs for users of the Apple iPhone or iPad is the inability to delete apps. When you tap and hold the screen, an ‘X’ doesn’t appear in the upper-left corner of the icon as expected.
Common reason there is no “X” is a restriction setting. Perhaps this setting was accidentally set and forgotten about.
Enter the password set for restrictions.
Set the “Deleting Apps” setting to “On” (green) so that it is allowed.
Once you ensure this setting is on, you should be able to remove apps without a problem.
If you are using an iPhone that detects the pressure of your tap, be sure that you are lightly touch and hold the app icon, then the “X” should appear. When you’re done, press the “Home” button to return to the normal Home screen. This seems to be the most common issue.