App is it good for my iPhone?
Is iCloud good for your account??
iPhone 13 Pro Max, 15
See this Apple article: What's the difference between device storage and iCloud storage?
What's the difference between device storage and iCloud storage? - Apple Support
If you turn On iCloud you get 5 GB iCloud free storage.
When you need more iCloud storage you can upgrade.
See this Apple article: Upgrade to iCloud+
Upgrade to iCloud+ - Apple Support
See also: iCloud+ plans and pricing
iCloud+ plans and pricing - Apple Support