Anki turns revision into a daily habit that actually sticks. Learn how spaced repetition works, how to write cards that teach rather than test your patience, and the simple routine that keeps reviews under twenty minutes a day.
You know that feeling. You read a chapter twice, highlight half of it, close the book feeling quietly confident, and then sit down in the exam and discover that most of it has simply gone. It is not that you did not study hard enough. It is that rereading is a weak way to learn. Your brain remembers things it has had to work to recall, not things it has passively looked at. That is the whole idea behind Anki, a free flashcard app built around a technique called spaced repetition. This guide will get you set up in about twenty minutes, show you how to write cards that actually work, and give you a simple daily routine you can stick to.
Anki is a flashcard app you can install on your computer and your phone. You create decks, which are just collections of cards on one topic, and each card has a question on the front and an answer on the back. The clever part is the scheduling. When you review a card, you tell Anki how hard it felt, and it decides when to show it to you again. Cards you know well come back rarely. Cards you keep forgetting come back soon, and often. Over weeks, that spacing is what moves facts from short term memory into the kind of memory that survives until exam day.
The idea is older than the app. Psychologists have known for more than a century that we forget most of what we learn within days unless we practise recalling it, and that recall works best when it is spread out over time. Anki simply automates the timetable, so you do not have to keep track of which card is due when. Your only job is to show up and answer honestly.
Most beginner decks fail for the same reason: the cards are bad, not the method. A card that asks you to remember a whole paragraph will teach you nothing, because you will either get it half right or give up and flip it. Good cards are small, specific, and phrased as questions.
Here is the difference in practice. A weak card says: Front: 'Mitochondria.' Back: a paragraph about energy production. A strong card says: Front: 'What is the main job of the mitochondria?' Back: 'To produce ATP, the cell's usable energy.' Same topic, completely different result.
After you flip a card, Anki asks how it went. Your answer sets the next interval, so it is worth knowing what each button means.
| Button | When to press it | What happens next |
|---|---|---|
| Again | You got it wrong, or you guessed | The card comes back soon, usually within the same session or the next day |
| Hard | You got it right, but only after a struggle | The card comes back sooner than it would have |
| Good | You got it right with normal effort | The card moves ahead by a normal step |
| Easy | You knew it instantly, without thinking | The card jumps much further into the future |
When in doubt, press Again. An honest Again costs you a few seconds. A dishonest Good costs you the memory.
Never rate a card Good because you recognised the answer after flipping. Recognition is not recall. If you could not say it before you flipped, press Again. Your future self will be grateful.
Anki is brilliant for facts, vocabulary, formulas, dates, and anything with a clear right answer. It is less useful for essays, arguments, and deep understanding on their own. If your subject is mostly about connecting ideas, use Anki for the building blocks, the terms and definitions you need at your fingertips, and spend your remaining study time writing, solving problems, and discussing. Flashcards support understanding. They do not replace it.
Start today, with ten cards from something you studied this week. Review them tomorrow, and the day after. Within two weeks you will notice something quietly strange: facts you used to lose overnight are still there. That is not a trick. It is just your memory, given the workout it was always supposed to get.
The desktop app and the Android app are free, and syncing through AnkiWeb is free too. The iPhone app is a paid one-time purchase, which is how the project is funded. You can use Anki fully without ever paying, by studying on a computer or an Android phone.
Most students spend ten to twenty minutes on reviews once the habit is established. That time grows with the number of cards you add, which is why beginners should add only ten to twenty new cards a day. If reviews start taking longer than half an hour, stop adding new cards until the load settles.
Yes, for the factual foundations of any subject: vocabulary in a language, definitions in law, formulas in maths, names and dates in history. For essays and problem solving, use Anki to lock in the building blocks, and practise the thinking itself separately, by writing and solving problems.
Making your own cards teaches you while you write them, so your own cards will usually stick better. Shared decks are useful when a subject has a large standard vocabulary, like medical anatomy or a language's most common words. If you use one, delete the cards your course does not cover, and rewrite any card you do not understand.
Nothing terrible. Your overdue cards pile up, but Anki does not punish you for it. Just do a shorter session, clear what you can, and let the rest wait for tomorrow. The worst response to a missed day is trying to clear everything at once and burning out, so keep the session small and get back on track the next day.
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