Mindstone is a digital learning platform designed to enhance online learning experiences by offering tools to improve knowledge retention and engagement. It provides features such as read-it-later services, annotation, and highlighting, allowing users to curate and organize information from various online sources effectively. Mindstone also facilitates collaborative learning by enabling users to share notes, comments, and insights with peers. Additionally, the platform leverages techniques such as spaced repetition to aid in memory retention, helping users build a more efficient and personalized learning process.