Remember Things Forever

The ultimate solution to simple and efficient memorization

Online Spaced Repetition Flashcards

Now with Javascript ES2015 (ES6) API cards!
Are you a teacher? See Spaced Repetition for Schools
Simple flashcard creation on the Mac and PC Flashcard app on Android tablet and iPad Flashcard app on Android smartphone and iPhone

What is Spaced Repetition?

1. 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).

2. Spacing Effect

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

3. 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.
Wikipedia .



No installation. No synchronization between devices. 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 foreign languages to maps and chemical symbols. Or simply select a deck from the official deck list, which includes decks for English vocabulary, Japanese Kanji, programming language APIs, and more.

Memorize Anywhere, Any Time

The key to memorizing is repetition. Use your smartphone to review your cards in your spare time, anywhere, any time.

Memorize "Super" Efficiently

With Spaced Repetition, you spend time on those that need it, not on the ones you have memorized. Spend the minimium time required to keep things memorized, super efficiently.

Memorize by Writing

Handwritten answer Handwrite your answers directly on screen to precisely test your memory and to help you memorize better. Keyboard input is also supported.

Memorize Maps and Pictures

Card with image Add images to your cards to memorize maps, pictures, and drawings.

Format Content as You Wish

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.

Card Upload to the Rescue

Creating cards may be tedious. If you have cards in another system or want to create cards with other software such as Excel, simply import them as a CSV file.

Receive Reminders

Receive reminders when you have cards due for review, specifying the time of day at which you want to be notified.

Exam Preparation

Prepare for exams by focusing on the cards you often forget. Simply specify the number of worst-performing cards you want to review.