Remember Things Forever

The ultimate solution to simple and efficient memorization

Web-based Spaced Repetition Flashcards

Simple flashcard creation on the Mac and PC Flashcard app on Android tablet and iPad Flashcard app on Android smartphone and iPhone

Why Spaced Repetition?

Forgetting Curve

The Forgetting Curve

Humans forget newly learned material in a matter of days (red curve) unless reviewed from time to time (green curves).
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Spacing Effect

Humans more easily remember items when they are studied a few times spaced over a long time span than when studied repeatedly in a short period of time.
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Spaced Repetition

Spaced repetition is a learning technique in which items are reviewed in increasing intervals of time to make most use of the spacing effect so that they can be remembered effectively and efficiently. It is especially well suited for memorizing huge amounts of material and keeping them indefinitely in memory.
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No installation. No synchronization between smartphone and web. Directly access your cards with a simple, modern web application on an Android, iPhone, iPad, Mac, or PC.

Memorize Anything

Create your own decks to memorize anything from vocabulary and foreign languages to chemical symbols and programming language APIs. Or simply select a deck from the official decks list, which includes decks for Kanji, English vocabulary, programming language APIs, and more.

Memorize Anywhere

The key to memorizing is repetition. With access from your smartphone, review your cards when you have a bit of spare time, anywhere.

Memorize Efficiently

With Spaced Repetition, the repetition interval is automatically adjusted based on whether you've remembered the card or not, so you spend time on those that need it, and less on the ones you have memorized.

Memorize by Writing

手書き暗記カード Handwrite your answers directly on screen to precisely test your memory and to help you memorize better. Standard keyboard input is also supported.

Memorize Maps and Pictures

画像入り暗記カード Add images to your cards to memorize maps, pictures, and drawings.

Format Card Content Freely

Card with superscript and subscript Card content is interpreted in a lightweight markup language called Markdown, giving you the power to create cards with links, bold text, super/sub-script, etc., tailored to your needs.

Bulk Create with Ease

If you have cards in another system or a file containing card data, simply import them with a CSV file. Or use Excel or your favorite editor to create cards and import them with a few clicks.