Your iPhone and iPad come with a series of built-in apps, which you may never use and therefore may want to remove.
Such apps take up very little storage space, so removing them will not earn you much extra space. However, as they can penetrate your home screen, you will release some properties for other apps. If you run iOS 12 or later on iPhone or iPadOS 13 or later on iPad, you can remove most of these built-in apps.
These include Activity, Apple Books, Calculator, Calendar, Compass, Contacts, FaceTime, Files, Find My Friends (iOS 12 only), Home, iTunes Store, Mail, Maps, Measure, Music, News, Notes, Podcast, Reminders, Shares, Tips, TV, Videos, Voice Notes, Watch and Weather.  Apps that you cannot kick out include the App Store, camera, clock, find iPhone, messages, phone, photos, safari and settings.
Note that deleting some of the above apps can affect the functionality of other apps. For example, if you remove the Books, Maps, Music or Podcasts apps, you will not be able to use CarPlay effectively. Removing the Music app affects the playback of audio content in your library using Apple or third-party apps on some car stereos or stereo receivers. If you try to remove the Watch app and your Apple Watch is paired with your iPhone, you are first asked to pair your watch. And if you remove an app from your iPhone that is also on your Apple Watch, the app is removed from both devices.
However, if you get rid of the Contacts app, your contact information remains in the Phone app. If you remove the FaceTime app, you can still make and receive FaceTime calls through the Contacts and Phone apps. Deleting a built-in app also deletes your user data and any configuration files.
Let's look at how to remove and restore native apps on iPhone or iPad.