How to Increase Retention with Mastery

The Mastery feature converts your Readwise highlights into active recall formats such as Q&A and cloze deletion. By actively engaging with the material, you reinforce understanding and improve retention. This method transforms passive reading into an active learning adventure, making your knowledge more durable and actionable.

Creating a New Mastery Card

If you encounter a highlight in your Daily Review that contains information you want to remember better, simply click or tap the Master button below the card. If you're on a computer, you can use the keyboard shortcut M.

In the mobile app, the Master button sits in the bar at the bottom of each Daily Review or Themed Review card.

This will open up the Mastery card editor for the chosen highlight.

To create a Mastery card from a highlight outside of your Daily Review on web, navigate to the document within your Readwise library. After opening the document, find the highlight you'd like to convert, click the card to open the highlight view, then click the Mastery icon from there.

In the mobile app, open the highlight from your Library or your home feed, tap the ... in the top right corner of the highlight card, and choose Master highlight.

Q&A Cards

Q&A cards use the traditional concept of a flashcard: question on the front, answer on the back.

To create a Q&A Mastery card, click the Question & Answer tab at the top of the Mastery editor.

Come up with an insightful question about the highlighted passage and type it into the Question field. If the passage easily answers the question, you can click Use highlight text as answer, or you can write your own answer in the Answer field.

Click Save to view your new flashcard.

In the mobile app, tap the Question field to write your question, then tap the checkmark to confirm it. Tap the Answer field to write your answer, or tap Use highlight as answer to fill it in with the full highlight text. Tap the checkmark in the top right corner of the Master highlight sheet to save the card.

Cloze Deletion

With cloze deletion, a salient keyword or keyphrase is hidden from the passage, giving you an opportunity to pause and consider the missing word.

To create a cloze deletion Mastery card, click the Cloze Deletion tab at the top of the Mastery editor. (This is the default tab when opening the editor.)

Find the word or phrase you want to hide and select it.

Once you've selected the appropriate text, click Save to view the new flashcard.

In the mobile app, tap a word to hide it. To hide a phrase, press and hold on the first word, then drag across the rest of the phrase (up to 12 words). If the word or phrase you choose appears more than once in the highlight, every instance of it will be hidden on the card. Tapping Undo selection will clear your selection and allow you to start over.

Tap Save or the top right checkmark icon when you're done to create the Mastery card.

Editing and Deleting Mastery Cards

On web, click the down arrow in the top right corner of a Mastery card, then choose Edit Mastery Flashcard to reopen the card in the Mastery editor or Delete Mastery Flashcard to remove it.

To find the same options in the mobile app, tap the ... in the top right corner of a Mastery card to open its Actions menu.

Note that deleting a Mastery card will not delete the associated highlight.

Reviewing Mastery Cards

Once you've created your first Mastery card, your Daily Review will be divided into two halves. The first half will contain unprocessed highlights which have never been reviewed before in Readwise or haven't been converted to Mastery cards. The second half of your Daily Review will contain your Mastery cards. These are resurfaced according to a spaced repetition algorithm and presented in active recall form.

Each time you review a Mastery card, you'll be prompted to give feedback on how quickly you'd like to review it again: soon, later, or someday. (You can also select "never" if you'd like to remove the card entirely.)

If you had no idea what the answer was, you might want to choose "soon", but if you knew it immediately and don't feel you'll be forgetting it immediately, you could choose "someday" instead.

Reviewing Only Mastery Cards

You can also review your Mastery cards separately from your Daily Review. On web, you can do this from your Mastery card dashboard.

To do so on mobile, tap the Mastery row on the Home screen (just below your Daily Review) to start a short session of up to five cards, starting with the ones you're most likely to have forgotten. The number on the row shows how many Mastery cards you have in total.

Retention vs Memorization

The first time most people see Mastery in Readwise, they tend to assume it's about memorization. Sometimes they even assume it's about rote memorization.

While that assumption is understandable, we want to emphasize that Mastery is not about memorization. The point isn't to memorize a text verbatim so you can pedantically rattle off some passage word-for-word at a cocktail party. (Even though that can be a very fun party trick, in the right crowd.)

No, the point is to reprogram your brain. To prime your mind to spot patterns, form connections, and resurface the right idea at the right time. For example, if you apply Mastery to Deep Work and your weekly calendar starts to fill with shallow calls and meetings, your mind will likely notice the pattern and then start nudging you to create some uninterrupted space. Maybe I should schedule a four-hour focus block to protect that currently unoccupied Thursday morning?

Many Readwise users are frustrated by the inefficiency of books because they spend lots of time reading but then forget so much, leading to little or no change in their daily lives. If that resonates with you, Mastery could be the key you need to unlock the full power of your book smarts.