iCloud+ is primarily cloud backup and storage solution for iPhones. Those two are both very tightly integrated. The custom email domain is a side feature... bu

iCloud+ is primarily cloud backup and storage solution for iPhones. Those two are both very tightly integrated. The custom email domain is a side feature... but it does work well, and it's essentially free (assuming you want your photos properly backed up... and who doesn't). I'm not sure if that help article is accurate though - I would think you can subscribe to iCloud+ from their website. You have to go to the website to manage your email domains for example.