Saturn is a dedicated application for accessing Mastodon and the federated social network, emphasizing a user-friendly interface free from algorithms, ads, and privacy concerns. It allows users to scroll, post, follow, like, and repost content in a chronological order, ensuring a straightforward social networking experience. Key features include discovering content from various timelines, viewing popular posts, and engaging with trending tags and suggested accounts.

The app also offers a robust post composer, enabling users to create rich content with images, videos, GIFs, and polls, while also allowing for custom post visibility and scheduling. Saturn supports powerful sharing options, including the ability to share directly to Instagram and manage multiple accounts seamlessly. Additional functionalities like live activities, extensive filters, and customizable themes enhance usability, making Saturn a versatile choice for Mastodon users on iPhone.