Anki is a free spaced repetition software that uses an algorithm to show you flashcards at the exact moment you are likely to forget them. Research from LeanAnki indicates that this method can make studying 1714.29% more efficient than conventional flashcards. StudyCards AI automates this process by converting PDFs into these high-efficiency cards.
Anki is a powerful tool for anyone who needs to memorize large amounts of information for the long term. Whether you are studying for medical boards, learning a new language, or preparing for a certification, Anki removes the guesswork from studying by telling you exactly what to review and when.
At its core, Anki is a flashcard application based on two scientific principles: active recall and spaced repetition. Active recall is the process of challenging your brain to retrieve information without looking at the answer. This mental effort strengthens the neural pathways associated with that memory.
Spaced repetition takes this a step further by spacing out these recall events. According to research from Birmingham City University, this method involves reviewing information at closer intervals initially and then gradually increasing the gap. This combats the "forgetting curve," a theory discovered by Hermann Ebbinghaus which shows how quickly we lose access to new information if it is not reinforced.
Unlike traditional studying, where you might read a chapter three times in one night (cramming), Anki ensures you see the card once today, again in four days, then in two weeks, and eventually once a year. This transforms short term memory into long term retention.
Many beginners feel overwhelmed by the interface. To avoid this, follow these exact steps to get your first session running. You can find detailed installation steps on WikiHow, but here is the workflow for your first 15 minutes.
A "deck" is simply a folder for your cards. Do not put all your cards into one giant deck, as this makes it harder to organize your study sessions.
Click the "Add" button at the top of the screen. You will see a window with several fields. For beginners, stick to the "Basic" card type.
Double-click your deck and click "Study Now." Anki will show you the front of the card. Once you have thought of the answer, click "Show Answer."
You will now see four buttons: Again, Hard, Good, and Easy. This is where the algorithm lives:
The biggest mistake beginners make is creating "bloated" cards. If a card contains a paragraph of text, your brain will memorize the shape of the paragraph rather than the actual fact. This is called the illusion of competence.
To avoid this, follow the Minimum Information Principle. Every card should be "atomic," meaning it contains exactly one discrete piece of information.
Compare these two approaches to the same topic (The French Revolution):
Bad Card (Too complex)
Front: Describe the causes of the French Revolution.
Back: The revolution was caused by social inequality, a financial crisis due to war debts, and the influence of Enlightenment ideas about liberty and equality.
Good Cards (Atomic)
Card 1 Front: Which philosophical movement influenced the French Revolution's ideas of liberty?
Back: The Enlightenment.
Card 2 Front: What was a primary financial cause of the French Revolution?
Back: War debts.
Once you are comfortable with Basic cards, switch to "Cloze" cards. A cloze deletion is a fill-in-the-blank card. Instead of a question and answer, you provide a sentence and hide a specific word.
Example: "The {{c1::Mitochondria}} is the powerhouse of the cell."
Cloze deletions are faster to create and often more intuitive for complex definitions. If you find creating these manually too slow, you can use an AI flashcard generator to automate the process.
The default settings in Anki are designed for the average user, but they are rarely optimal for high-stakes studying. You can access these by clicking the gear icon next to your deck name and selecting "Options."
To prevent burnout, you must control the flow of new information. If you add 500 cards in one day, you will have a "review avalanche" a week later that makes you want to quit.
For years, Anki used the SM-2 algorithm. However, a newer system called Free Spaced Repetition Scheduler (FSRS) has emerged. FSRS uses your personal review history to predict exactly when you will forget a card, often reducing the total number of reviews needed while maintaining the same level of retention.
If you want to move beyond basic settings, you should read about Anki FSRS and how it works. For a broader look at optimization, check out the complete optimization guide.
The hardest part of Anki is not the software, but the discipline. The algorithm only works if you show up every day. If you miss three days, your reviews will pile up, creating a psychological barrier to returning.
There is a debate in the Anki community about whether you should create your own cards. According to advice from Kelly Takes Medicine, creating cards for medical school can be too time consuming, and using pre-made decks like the AnKing deck is often more efficient.
The truth is a middle ground. Pre-made decks are excellent for standardized facts (e.g., anatomy or vocabulary). However, you must understand the material before you memorize it. Memorizing a card without understanding the concept is just "pattern matching," not learning.
If you are looking for high quality starting points, you can explore where to find pre-made decks.
A "leech" is a card that you consistently get wrong. Anki will automatically flag these after a certain number of failures. Do not keep pressing "Again" on a leech. If you cannot remember a card, the problem is usually the design of the card, not your memory.
When you find a leech, try these three fixes:
Once you have a daily habit, you can add tools to make the experience more pleasant. Anki is open source, meaning developers create plugins called "add-ons" to add new features.
Add-ons can change everything from the visual appearance of your cards to how you track your statistics. Some users prefer a more gamified experience, while others want better organization.
You can find lists of the best Anki add-ons for 2025 or look for a more comprehensive list of must-have plugins to customize your interface.
One of Anki's greatest strengths is that you can study in "dead time," such as while waiting for a bus or standing in line. This prevents your review sessions from feeling like a massive chore at the end of the day.
To set this up, ensure you have synced your desktop app to AnkiWeb, then download the mobile version. For specific setup instructions, see our guide for Anki on iPhone and Android.
If you are wondering how this compares to other tools like Quizlet, it is important to note that while Quizlet is easier to set up, it lacks the sophisticated spaced repetition algorithm that makes Anki superior for long term retention. For a detailed comparison, see Anki vs Quizlet.
The most significant barrier to using Anki is the time it takes to create high quality, atomic cards. Spending hours copying and pasting from a PDF into Anki is not studying (it is clerical work). StudyCards AI solves this by using artificial intelligence to analyze your documents and automatically generate cards that follow the Minimum Information Principle. You can upload your notes and export them directly to Anki, allowing you to spend 100% of your time on active recall rather than data entry.
"I used to spend my entire Sunday making cards for the upcoming week of med school, which left me exhausted before I even started studying. Using StudyCards AI, I just upload my lecture PDFs and have a full deck in minutes. It actually lets me use Anki without the burnout."
- Sarah J., Second Year Medical Student
Yes, the desktop version for Windows, Mac, and Linux is completely free and open source. There is a one-time fee for the iOS app to support the developer, but the Android version (AnkiDroid) and the web version are free.
For most beginners, 20 new cards per day is a sustainable limit. While this seems low, remember that every new card creates future reviews. Adding 100 cards a day can quickly lead to 500+ daily reviews, which often leads to burnout.
Use "Again" if you completely forgot the answer or got it wrong. Use "Hard" if you eventually remembered it but it took a long time. "Again" puts the card back into the short term learning phase, while "Hard" keeps it in the review phase but increases the interval slowly.
Anki is best for discrete facts. For conceptual subjects (like philosophy or advanced math), you should first study the concepts in a textbook and then use Anki to memorize the core definitions, formulas, or key arguments that support those concepts.
The only way to clear a backlog is consistency. If you have too many, consider temporarily increasing your "Maximum Reviews/Day" and focusing exclusively on reviews (setting New Cards to 0) until the backlog is gone.
Generate Anki flashcards from PDFs