Open the Settings app
Tap General
Tap iPhone Storage
Select the app you want to clear
Tap Offload App to remove the app and keep its documents and data
Tap Delete App to remove the app and its data completely
Reinstall the app from the App Store if needed
Open the app and sign in again if required
For Safari data, go to Settings
Tap Safari
Tap Clear History and Website Data
For app-specific data, open the app’s own settings and look for a clear cache or reset option
For iCloud app data, go to Settings
Tap your Apple ID name
Tap iCloud
Tap Manage Account Storage
Select the app and delete its stored data if available