Recall at speed
Flappy Scholar: fly through the gaps, and every third one asks a question. Try it on a real book.
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Space, ↑ or W to flap, 1–4 to answer.Tap to flap, then tap an answer. Your progress moves to your account when you sign up.
How it works
Nothing to reread: only things to answer.
Upload your material
A textbook, lecture notes, a summary: any PDF or EPUB up to 50 MB, in any language, on any subject that is written in sentences.
Every key idea becomes a question
The document is read for its key ideas and each gets multiple-choice questions, with the answer explained. Nothing is left to reread: only things to answer.
Answer it everywhere
Battles in the RPG, orbs in the tower, questions in the mini-games, cards in the deck, rounds in a duel: five games, one set of questions, one score.
Built for retrieval
The mechanics are the method.
Every screen asks
There is no reading mode. Progress in every game comes from answering, so a session is retrieval practice from the first minute to the last.
Feedback at once
Each answer shows the right one and why, straight away, when it does the most good; a right answer you were unsure of gets fixed too.
Missed questions return
A wrong answer comes back in rematches and boss fights, and sooner in the flashcard deck; a right one waits longer. Practice goes where it is needed.
Spaced over days
The flashcard deck schedules every question by how well you knew it, so an idea is tested again just before it would fade.
What the research says
Four findings from the learning literature, and the mechanic that applies each one.
Retrieval practice
Every battle is a test, and testing beats rereading.
A 2013 review of ten study techniques rated practice testing and spacing the most useful, rereading and highlighting among the least. Tested students remembered more a week later than rereaders.
Dunlosky et al., 2013Spacing
Missed questions come back later, and flashcards are scheduled over days.
Across 317 experiments, spaced study beat one sitting, and the best gap grew with how long the memory had to last. Cramming works for tomorrow and fails in four weeks.
Cepeda et al., 2006Feedback right away
Every answer shows you the right one, and why.
Feedback after a test raises what you keep, and not only on the wrong answers: it also fixes the right ones you were unsure of, which slip away first.
Butler, Karpicke & Roediger, 2008Motivation you can feel
Levels, bosses and streaks make your progress visible.
People stick with what makes them feel competent and lets them choose. A rising level and a fallen boss are competence you can see; five modes are the choice.
Ryan & Deci, 2000- Dunlosky, Rawson, Marsh, Nathan & Willingham (2013). Improving students’ learning with effective learning techniques: promising directions from cognitive and educational psychology. Psychological Science in the Public Interest, 14(1), 4–58.
- Roediger & Karpicke (2006). Test-enhanced learning: taking memory tests improves long-term retention. Psychological Science, 17(3), 249–255.
- Cepeda, Pashler, Vul, Wixted & Rohrer (2006). Distributed practice in verbal recall tasks: a review and quantitative synthesis. Psychological Bulletin, 132(3), 354–380.
- Butler, Karpicke & Roediger (2008). Correcting a metacognitive error: feedback increases retention of low-confidence correct responses. Journal of Experimental Psychology: Learning, Memory, and Cognition, 34(4), 918–928.
- Ryan & Deci (2000). Self-determination theory and the facilitation of intrinsic motivation, social development, and well-being. American Psychologist, 55(1), 68–78.
When another tool fits better
Three cases where you want something else.
Cramming for tomorrow
The games are slower per question than a drill. With an exam in the morning, open the flashcard deck of the world and grade straight through it.
Problem sets
Recall practice tests facts and ideas. Calculus, coding and proofs are learnt by doing the problems; use the game for the theory behind them.
Nothing to upload yet
The questions are written from your material. Without notes or a textbook of your own, start with a public book world instead.
Built on real books
Live numbers, straight from the database.
Questions
What is active recall?
Is a quiz game really active recall?
Active recall or flashcards?
How does the spacing work?
Does it work for my subject?
Is it free?
See also
Free to start
Play the free worlds for as long as you like. Pay once when you want your own books in.
- Unlimited play on free public worlds
- A taste of premium worlds: 5 battles, 10 tower questions and 10 mini-game questions each
- Live duels with friends, classmates or the computer
- All five modes, on any device
- Progress saved to your account
Launch price for the first 100 buyers or until 31 Dec 2026, then $49.99. 97 of 100 left.
- Turn your own notes into games (3 book-to-game credits)
- Unlimited battles on every world
- Unlimited mini-game questions on every world
- Duels on every map of every premium world
- Every premium world, every map, all five modes
- Your own flashcards in any world (up to 200)
- Study timer extras: room themes, window views, pets and focus insights
- Classrooms: share the worlds you generate with your students, who join free
- All future updates included
Need more later? Extra book-to-game credits are $4.00 each, 5% off from 3, 10% off from 5 and 20% off from 10.
Reread it once more, or answer it now.
Upload your notes and let the game ask.
Turn my notes into recall practice