Elon Musk makes history as Apple permits single-letter X app into App Store following Twitter rebrand
Having previously rejected the X app from its App Store for having too short a name, Apple has had a change of heart, changing the rules for the renamed Twitter.
It used to be the case that app names had to be at least two characters in length, and this led to delay in getting the X app listed. But with Apple having relaxed for rules after Musk's latest example of spontaneity, X is the first -- and currently only -- app to be listed with a name comprising a single character.