Twitter just changed almost every part of its iOS app

The company just unveiled a series of changes, including a major overhaul of its iOS app, as well as changes to the look and feel of some of its most important features, like the reply button.

Among the most immediately noticeable changes: users' profile photos now appear as round icons instead of squares, and the reply button has changed from an arrow to a chat bubble. (Twitter's VP of User Research and Design Grace Kim says this was to make things less confusing for new users who often confused the reply button with a "back" or "delete" function.)

iOS users will see even more changes. The profile tab has been removed from the bottom of the app to a pull out tray on the left side, similar to Twitter's Android app. This is the same menu where you can find account settings, lists, Moments you've created as well as the option to switch accounts.