#social-algorithms

#social-algorithms

Retro, a friend-focused, photo-sharing app with roughly a million users, is adding a new feature that lets you time-travel through your old photo memories from your phone's Camera Roll. While the app today offers a way to share photos of what's happening during your week with a private group of friends, or create shared albums, this latest addition, dubbed "Rewind," is private to you - unless you choose to share the photos with others.