Superhuman is an email app designed to help users manage their emails more effectively. It offers a range of features, including autosummarize email threads, split inbox, read receipts, snippets, calendar management, schedule send, contact information panel, instant replies, easy unsubscribe, and keyboard shortcuts. These features justify the cost for the user, who finds Superhuman to be worth the monthly subscription fee despite its expense. The app offers a visually appealing interface, streamlines multiple tasks, and incorporates AI to enhance email processes.