Spaced Repetition With Anki: A Beginner’s Guide

Anki is a free, wildly popular flashcard program used by medical students, language learners and anyone who needs to remember a lot for a long time. Its appeal is simple: it takes the two best-evidenced study habits — testing yourself and spacing that testing over time — and automates the hard part, the scheduling. This guide explains how it works and how to start without falling into the common traps.

The idea behind it: spacing plus retrieval

Two findings from learning science do most of the work in Anki. The first is the testing effect: retrieving a fact from memory strengthens it far more than re-reading. The second is the spacing effect: reviews spread out over time produce much more durable memory than the same reviews crammed together. If you want the fuller background, see what spaced repetition is and what active recall is.

The problem with doing this by hand is knowing when to review each of hundreds of facts. Review too soon and you waste time on things you already know; too late and you have forgotten them. Anki solves this. Each time you see a card, you rate how easily you recalled it, and Anki uses that rating to schedule the next review for roughly the moment you are about to forget — expanding the interval each time you succeed. Over weeks, a well-known card might not reappear for months, freeing your reviews for the material you actually struggle with.

How Anki works, step by step

The mechanics are straightforward once you see them in action:

1. You see the front of a card — a question or prompt — and try to recall the answer before revealing it.
2. You reveal the back and check whether you were right.
3. You rate your recall. Anki gives buttons like Again, Hard, Good and Easy. “Again” means you failed and the card returns soon; “Good” and “Easy” push the next review further out.
4. Anki schedules the next review based on your rating, and moves on. Each day it shows you the cards that are due plus a set number of new ones.

Historically Anki’s scheduling grew out of the SM-2 algorithm pioneered by the SuperMemo project; modern versions also offer a newer scheduler you can enable. You do not need to understand the maths to benefit — the defaults work well for beginners.

Getting started

Install and create a deck

Download Anki for your computer, or AnkiDroid on Android; both are free. (The iPhone app is paid, which helps fund development.) Create a deck — a simple bucket of cards for one subject, such as “Spanish vocabulary” or “Biology terms.”

Make your first cards

Add cards with a front (prompt) and back (answer). The golden rule is to keep them small and focused: one idea per card, phrased so there is a single clear answer. Instead of one card listing five features of something, make five short cards. Writing your own cards is itself a form of learning, so it usually beats downloading someone else’s deck — though shared decks can be a reasonable shortcut for large standard bodies of facts.

Set a sustainable pace

Start with a modest number of new cards a day, perhaps ten to twenty. This matters more than beginners expect: every new card generates future reviews, so adding hundreds on day one creates a crushing backlog a week later. Let the daily review count settle before you turn up the volume.

Card types that go beyond simple front-and-back

Once the basic question-and-answer card feels natural, two variations are worth knowing. Cloze deletion hides part of a sentence — “The capital of France is […]” — so you retrieve a fact in its natural context; it is excellent for definitions, facts embedded in sentences and language example phrases. Reversible cards automatically create both directions of a pair, so a vocabulary word is tested from your language to the target and back again, which is useful because recognising a word is easier than producing it. You do not need these on day one, but reaching for them as you grow keeps cards varied and forces genuine recall rather than lazy pattern-matching. Whatever the type, the rule stays the same: one clear idea, one clear answer.

Syncing across your devices

A free AnkiWeb account lets you sync your decks between your computer, phone and the web, so you can add cards at your desk and review them on a bus. This is a big part of what makes the daily habit stick: the reviews follow you, and dead minutes in a queue or waiting room become useful. Set up syncing early so your progress is backed up and available everywhere; losing months of carefully built cards to a dead laptop is an avoidable heartbreak.

The habit that makes it work

Anki only pays off if you review most days. The whole system assumes a steady drip, because that is what spacing requires. A ten-minute session every morning will out-perform a two-hour cram once a week, and it keeps the review pile from snowballing. Attach the review to an existing routine — with coffee, on the commute — so it runs on autopilot; the same approach we cover in building habits that last. If you miss days, nothing is lost: work through the backlog steadily and hold off on new cards until you are caught up.

Common mistakes to avoid

The subtlest error is memorising things you do not actually understand. Anki is superb at cementing facts, but it cannot supply comprehension. Learn the concept first — ideally by explaining it in your own words, as in the Feynman technique — then use Anki to make the details permanent.

How long until Anki pays off

Anki asks for patience, because its benefits are back-loaded. In the first week the app can feel like extra work for little visible reward — you are seeing cards often and the intervals are still short. The payoff arrives over the following weeks, as well-known cards stretch out to intervals of days, then weeks, then months, and you notice you simply remember things you used to forget. This delay trips up many beginners, who quit before the compounding starts. If you can hold the habit for three or four weeks, you will usually cross the point where the daily review shrinks and the retention becomes obvious — and that is when people tend to become Anki converts for life. Trust the curve; the early cost buys a large later saving.

Who Anki is (and is not) for

Anki shines when you have a large volume of discrete facts to retain over months or years: vocabulary, anatomy, legal terms, formulas, dates. It is less suited to skills that are mostly about doing — you learn to write code or play an instrument by practising, not by flipping cards, though flashcards can still support the underlying knowledge. It is also easy to over-use: not everything deserves a card, and a deck stuffed with trivia you will never need becomes a daily chore that crowds out what matters. Be selective, and card only what you genuinely want to remember for the long term.

Used for the right job and reviewed consistently, Anki turns the daunting task of remembering thousands of things into a calm ten-minute daily habit. Start one small deck today, keep the cards short, understand before you memorise, sync your devices, and show up most mornings — then let the algorithm handle the timing while you get on with the rest of your learning.