Apple recently announced an all-new email categorization feature for iOS 18, but a newly-discovered prototype of the UI dates back to around five years ago, before the release of iOS 13.

Apple’s email categorization feature was originally created with iOS 13 in mind

Apple’s email categorization feature was originally created with iOS 13 in mind
At the company’s annual WWDC on June 10, Apple showcased a significant update to its in-house mail application. By analyzing the text contents of emails through machine learning, the new-and-improved Mail app will be able to organize emails into several pre-defined categories:
Apple’s on-device email categorization is a feature years in the making
Apple’s on-device email categorization is a feature years in the making