rubra - Bookmark Manager

Rubra is a social bookmarking mobile application that enables users to save, organize, and share web content. It allows for the creation of collections, collaboration with others on shared content, and offers both anonymous and account-based usage for syncing across devices.

Rubra is a social bookmarking app that allows users to save, organize, and share web content. It explicitly mentions saving articles and stories, organizing them by topics and into collections, and sharing them with friends or inviting contributors to collections. The app also highlights instant use without an account, but offers syncing across devices with an account, implying sign-in authentication. The description mentions a 'social bookmarking app for saving, sharing and discovering content on the web,' which aligns with the core concept. While it doesn't explicitly mention 'Tufte-style side notes' or 'embed support,' the other features are strongly present.