It has both modes. At the top of your feed, there's an icon that looks like three sparkles. If you click it, you can set your feed to "Home" (the Facebook-ish o

It has both modes. At the top of your feed, there's an icon that looks like three sparkles. If you click it, you can set your feed to "Home" (the Facebook-ish option where an algorithm creates your feed) or "Latest Tweets" (the linear timeline).