It should be noted that any default application is removed may be reinstated at any time. You will realize that the process of removing a default application is basically the same as uninstalling other applications on iOS devices.
Locate the default application you want to delete from the iPhone or iPad
How to delete the default applications in iOS 10
Press and hold the application icon to make shake and make the delete button (X) appears, tap on (X) to remove the default application.
Confirm you want to delete the application by selecting "Delete"