Prismo vs Readwise: highlights you reread, or ideas you can recall
Readwise is the best tool there is for collecting your highlights and showing them to you again. Prismo does something different with the same goal. Here is where each one wins, from the person who makes one of them.
Stay with Readwise if you highlight a lot on Kindle or other apps and want those passages collected, searchable and shown back to you. Choose Prismo if your problem is that you can't explain what you read a month later: you write a few lines in your own words, and Prismo quizzes you on the ideas with spaced repetition. Rereading a highlight helps you recognize it. Answering a question helps you remember it.
One page of a book, two ways
The clearest way to see the difference is to follow a single passage through both apps. Here is a sentence most readers of Thoreau's Walden have highlighted at some point.
“I went to the woods because I wished to live deliberately, to front only the essential facts of life, and see if I could not learn what it had to teach, and not, when I came to die, discover that I had not lived.”
Henry David Thoreau, Walden (1854)
You read it again. It is beautiful, and it feels familiar. You move to the next highlight.
Walden: Thoreau lived in a cabin he built himself by Walden Pond, on land owned by Emerson, for two years and two months. Point was to live "deliberately", strip life down to what's essential and see what's left.
Three days later: Why did Thoreau say he went to live at Walden Pond?
You have to bring the answer back yourself, in your own words.
Prismo also asks about the parts you would never highlight, like whose land it was.
Both are useful. They just train different things. Seeing a highlight again keeps a passage familiar; answering a question about it makes it something you can recall when you need it in a conversation, a decision or an essay. Memory research is fairly clear that the second one is what lasts. I wrote more about that in the guide to active recall.
Prismo vs Readwise at a glance
| Prismo | Readwise | |
|---|---|---|
| How things get in | You write or dictate a few lines in your own words, or add a photo of a page or a PDF | Syncs highlights from Kindle, Apple Books, Kobo, Instapaper and many other sources, plus photos of paper books |
| What you review | Questions written from your notes: multiple choice, true or false, fill in the blank, short answer, connections between ideas | Your highlights, shown again in a Daily Review by email and in the app |
| Active recall | Built in. Every topic becomes questions automatically. | Optional. With Mastery you turn a highlight into a Q&A or cloze card yourself. |
| Scheduling | Spaced repetition based on SM-2 | Highlights resurface over time; Mastery cards use spaced repetition |
| Organization | Ideas are filed into topics and collections for you, with search and a knowledge map | By book and source, with tags and notes |
| Reading app | None | Readwise Reader, a read-it-later app, on the full plan |
| Export | Your whole library as a zip file | To Notion, Obsidian and more, on the full plan |
| Platforms | iPhone, iPad, Android | Web, iPhone, iPad, Android, browser extensions |
| Price | Optional Premium subscription; prices are shown in the app | Lite $5.59/month, full $9.99/month billed yearly ($12.99 monthly); 30-day trial; 50% off for students |
| Best for | Remembering and using ideas from books, courses, podcasts and work | Heavy highlighters who want every passage collected, searchable and resurfaced |
Readwise details from its pricing page and documentation, checked on October 8, 2026. If something changed, tell us and we'll update this page.
Where Readwise is better
Readwise is excellent at a few things Prismo doesn't try to do, and if these matter most to you, it is the better choice:
- Zero-effort capture. Highlight on your Kindle and it simply shows up. Prismo asks you to write a few lines, which takes a couple of minutes per chapter.
- The author's exact words. If you collect quotes for writing, teaching or sermons, you want the original sentence, not a summary.
- Reading in the same place. Reader handles articles, newsletters, PDFs and ebooks, and its highlights flow straight into your review.
- Desktop and integrations. Readwise works in the browser and exports to Notion and Obsidian. Prismo is a phone and tablet app.
Where Prismo is better
- You are tested, not reminded. Every idea becomes questions, and you have to produce the answer. That is the difference between "I've read this" and "I can explain this".
- Your words, not the author's. Writing three lines from memory after a chapter is itself the most effective review you can do. Highlighting is the least.
- It works for things you don't highlight. Audiobooks, podcasts, a lecture, a conversation with a colleague, a documentary. If you can say what you learned, Prismo can quiz you on it.
- No card-making. Readwise Mastery can quiz you too, but you write each card by hand. Prismo writes the questions and you untick anything you don't want.
- Ideas connect across books. When a new note touches a topic you already have, Prismo adds to that topic instead of starting a new pile, so what you learn from different books ends up in one place.
Which one should you use?
Prismo is a better fit if…
- You finish books and can't explain them a month later
- You listen to audiobooks and podcasts more than you highlight
- You want to be quizzed, not just reminded
- You mostly learn on your phone
Stay with Readwise if…
- You highlight heavily on Kindle or in articles
- You need the author's exact words for writing or research
- You want a reading app and your highlights in one place
- You work on a computer and export to Notion or Obsidian
Using both
The two don't compete for the same minutes, so plenty of readers could use both. A routine that works:
- Read and highlight as usual. Let Readwise collect everything. Don't stop to take notes mid-chapter.
- Close the book at the end of the chapter. In Prismo, write or dictate three to five lines about what you took from it, without looking at your highlights. This is the step that does the remembering.
- Answer your Prismo review each day. A few minutes. The questions come back less and less often as you get them right.
- Use Readwise when you need the source. Writing something, or want the exact quote? Your highlights are all there.
If you are not sure which problem you have, try this: pick a book you finished three months ago and explain its main argument out loud. If you can, and you just want your favourite passages to hand, Readwise is enough. If you can't, that is the problem Prismo is built for.
