Last fall, on a flight back from China, Evan Spiegel decided to remake Snapchat.
Inspired by apps he’d seen in that country, Mr. Spiegel wanted to create a new version separating users’ friends’ content from the professional media. Each category would be sorted by an algorithm rather than Snapchat’s existing chronological feed. Huddling on the plane with one of his top designers, Will Wu, Mr. Spiegel hashed out a design for the future of the app.
