Touch and hold the app icon on the Home Screen
Tap Remove App
Tap Delete App
Tap Delete to confirm
If the app is in the App Library, touch and hold it there
Tap Delete App
Tap Delete to confirm
Open Settings
Tap General
Tap iPhone Storage
Select the app
Tap Delete App
Tap Delete App again to confirm
Delete any related app data from iCloud if needed
Open Settings
Tap your Apple ID name
Tap iCloud
Tap Manage Account Storage
Tap Backups
Delete old backups that still contain the app data if needed
Remove the app from any other synced Apple devices if you want it gone everywhere
Restart the iPhone after deletion if needed