All that being said, the options that users have can be a little confusing. According to the announcement tweet, you can use your Google account on the app and on the web. This is then followed by the Apple ID option on iOS, with the option to do so on the web coming soon.

Now, when you log in or sign up to join the conversation on Twitter, you have the option to use:▪️ Your Google Account on the app and on web▪️ Or your Apple ID on iOS, and soon on web pic.twitter.com/Nf56H1ghmY — Twitter Support (@TwitterSupport) August 2, 2021 If we were to be pedantic about the words used, one could argue that the Google account can be used on more platforms, while the Apple ID is locked to iOS devices. But on the flip side, people who are extremely privacy conscious would see an iPhone as providing an additional layer of that. Overall, this is an inconsequential addition to those who already have an account. But this move is likely meant to convince people who want to be on Twitter, but don’t want to make yet another internet account. (Source: Twitter)