Instagram is developing a new feature that could give its app more of a TikTok-like feel: Vertical Instagram Stories. Today, users browse through Stories through taps and horizontal swipes — a feature Instagram adopted from Snapchat. But now, Stories are passé. Even Snapchat is borrowing ideas from TikTok. Its recent launch of Spotlight, for example, is its own TikTok clone.

In many ways, vertical swiping feels more natural than taps and horizontal flicks. It is, after all, how users navigate much of the mobile web, as well as other key features across a variety of social apps, like Facebook’s News Feed or YouTube’s home page.