Readwise Reader helps knowledge workers retain and apply what they read. The platform collects highlights from Kindle, Instapaper, and other reading sources, then uses spaced repetition to resurface key insights. Features include AI-assisted summarization, document organization, and cross-source search. Ideal for authors, researchers, and lifelong learners, Readwise turns scattered reading into organized knowledge. The daily review emails and powerful search make previously read content far more accessible and useful in professional contexts.