Open Settings on your iPhone or iPad
Tap your name at the top
Tap iCloud
Tap Manage Account Storage or Manage Storage
Tap Backups or Apps Using iCloud
Select the app or backup you want to remove
Tap Delete Data or Delete Backup
Confirm the deletion
On Mac, open System Settings
Click your Apple ID
Click iCloud
Click Manage
Select the app or data you want to remove
Click Delete
Confirm the deletion
On iCloud.com, sign in with your Apple ID
Open Account Settings
Find the app-related data you want to remove
Delete the data if available
To remove an app from your device, press and hold the app icon
Tap Remove App
Tap Delete App
Confirm the deletion