Sporochnus pedunculatus, a cyanotype by Anna Atkins: five feathery seaweed fronds printed white against deep blue.
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Anna Atkins, Sporochnus pedunculatus, c. 1843–53

The science, handled

You forget half of what you learn within the hour.

Hermann Ebbinghaus measured it in 1885, and wrote down the remedy in the same book. Flora is the meeting halfway: a few questions a day, timed for just before you'd forget.

How much of the original learning was saved when Ebbinghaus relearned a list, by the time that had passed.
AfterWork saved on relearningForgotten
20 minutes58.2%41.8%
1 hour44.2%55.8%
9 hours35.8%64.2%
1 day33.7%66.3%
2 days27.8%72.2%
6 days25.4%74.6%
31 days21.1%78.9%

“We must not wait until the series of ideas committed to memory return to consciousness of themselves, but we must meet them halfway.”

Hermann Ebbinghaus, Memory, 1885. Table p. 76, quote p. 19 of the 1913 translation.
Column II is how much stuck: under half after an hour, a third after a day, a fifth after a month.

Little and often beats the night before. Spread out, 38 repetitions did the work of 68 crammed into one sitting.

Start learningWhat a century of studies since does and doesn't show

Using AI to make you smarter, not the other way around

AI is smart, but it's not a replacement for your unique brain. Flora uses AI to do the work of turning what you give it into questions worth answering, and then gets out of the way. You're the one who answers the questions, and the one who remembers the answers when you need them.

You can always edit, delete, or write new flashcards yourself, whether they were created by AI or not.

Things get clearer through repeated exposure

1 day
2 weeks
3 months
1 year
A day, then a few days, then a fortnight, then a season. The more confident you are in your knowledge, the longer Flora waits before asking you again, leaving you to focus on the things which you're still not sure about.The spacing above is compressed; the gaps grow far faster than they look.

Whatever you're curious about

Most learning apps have already picked the subject for you. Flora adapts to any subject matter.

Which grape is white Burgundy made from?

1 month

Chardonnay

1 month

One card, both faces — the question, the answer, and when it'll be asked again.

  • The thing you keep meaning to learn

    Wine regions, Rust's borrow rules, the bones of the hand, everyone's names at the new job. If it's written down somewhere, it can be a deck.

  • The things only you would know

    Write your own cards whenever you'd rather. They join the same rotation and come back on the same schedule.

Ceramium rubrum, a cyanotype by Anna Atkins: a fan of fine pale filaments against deep blue.

Start with one thing you'd hate to forget.

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The plates on this page are Anna Atkins's, from Photographs of British Algae: Cyanotype Impressions (1843–53), the first book illustrated with photographs. This copy is the one she gave to Sir John Herschel; it's in the New York Public Library now, which scanned it and released the scans into the public domain. A cyanotype darkens the longer it is exposed, which is where the blue on every card here comes from — and the blue itself is measured off Atkins's prints rather than picked.