Readwise aggregates highlights from Kindle, Instapaper, Pocket, and books, then resurfaces them via daily email and spaced repetition review sessions.
Each app below addresses a specific gap in Readwise's offering. We picked them based on real user review patterns and feature differentiation.
Amazon provides free access to all Kindle highlights at read.amazon.com. Users can browse, copy, and share highlights without any third-party app. Popular Kindle books have community highlights visible to all.
Explore Kindle Highlights data →Anki is the gold standard for spaced repetition learning. Users create flashcard decks manually from any content source. It lacks Readwise's automatic import but offers more control over what gets reviewed.
Explore Anki data →Obsidian's official Readwise plugin syncs highlights from Readwise into your Obsidian vault as Markdown notes. Combined with Obsidian's spaced repetition plugins, it replicates the core Readwise workflow inside a local notes system.
Explore Obsidian with Readwise Plugin data →Matter handles article and newsletter reading with highlighting and annotation, and its premium tier adds integration with note-taking apps. It overlaps with Readwise Reader for reading workflows but lacks the spaced repetition review layer.
Explore Matter data →SuperMemo is the research-origin tool that created spaced repetition algorithms. It is more complex than Anki but has deeper algorithmic sophistication. Available on Windows with a steep learning curve.
Explore Supermemo data →Clippings.io imports Kindle highlights from your device and provides browsing, tagging, and export to Evernote, Notion, and other tools. The free tier handles basic management; Pro adds unlimited exports.
Explore Clippings.io data →Readwise later launched Readwise Reader, a full read-it-later app bundled with the core Readwise subscription.
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