Open Settings on your iPhone or iPad
Tap your Apple ID name at the top
Tap iCloud
Tap Manage Account Storage or Manage Storage
Tap Backups
Select your device
Turn off backup for the app if listed there
Go back to iCloud
Tap Show All under Apps Using iCloud
Turn off the app you want to remove
On a Mac, open System Settings
Click Apple ID
Click iCloud
Click Manage
Select the app or backup data
Delete the app data if available
On iCloud.com, sign in with your Apple ID
Open Account Settings
Remove stored app data if available
Delete the app from your device if you no longer want it on the device
If needed, delete the app’s documents and data from iCloud Drive
Restart your device after making changes