Readwise

Readwise is a tool that helps you get far more value from everything you read by syncing your highlights from books, articles, tweets and documents into one place — and then helping you actually remember and use them. Most people highlight passages in Kindle books or save quotes from articles and never look at them again. Readwise solves that, turning your scattered highlights into a living, useful knowledge base that resurfaces the best ideas you've encountered.

The core feature is highlight syncing and spaced repetition. Readwise automatically pulls your highlights from Kindle, Apple Books, Instapaper, Pocket and many other sources, then emails you a daily digest of a few highlights to revisit. By resurfacing your highlights over time using spaced-repetition principles, it helps move great ideas from forgotten margins into long-term memory. You can also export your highlights to note-taking apps like Notion, Obsidian and Roam, making it a powerful engine for building a personal knowledge system.

Readwise also offers Reader, a modern read-it-later app that brings articles, newsletters, PDFs, ebooks and even YouTube transcripts into one place where you can read, highlight and annotate everything consistently — feeding those highlights right back into your Readwise library. This closes the loop from reading to retaining to applying. For lifelong learners, students, writers and knowledge workers who consume a lot of written content and want it to actually stick and compound, Readwise is a beloved tool. It transforms reading from a passive activity into an active system for accumulating and recalling knowledge, helping ensure the time you spend reading pays dividends long after you turn the page.