What is the difference between spaced repetition and normal flashcard review?

Normal flashcard review shows cards randomly or in fixed order regardless of how well you know them. Spaced repetition uses an algorithm to show you each card at the exact moment you are about to forget it — making reviews far more efficient and memories far stronger.

Is Focus Flow spaced repetition as good as Anki?

Focus Flow uses the same SM-2 spaced repetition algorithm as Anki. The core science is identical. Focus Flow has a more modern interface, works without an account, and combines flashcards with a Pomodoro timer and assignment tracker — all free.

How long does spaced repetition take to work?

You will notice stronger recall within 1-2 weeks of daily review. Full long-term memory consolidation on a topic typically takes 4-6 weeks of consistent spaced repetition — which is why starting at the beginning of semester rather than before exams produces dramatically better results.

How many flashcards should I review per day?

With Focus Flow's spaced repetition system, your daily review load is calculated automatically based on what is due. As a rough guide, 20-50 cards per day is a sustainable target for most university students. The algorithm handles the scheduling — your only job is to show up daily.

How Spaced Repetition Works — The Science Behind Remembering Everything You Study

You study for 3 hours the night before an exam. You pass. Two weeks later you remember almost nothing.

This is called cramming. And it is the least effective way to learn anything permanently. Not because you are not smart — but because you are fighting against how your brain actually stores memories.

Spaced repetition is the solution. And it is backed by over 100 years of scientific research.

The Forgetting Curve

In 1885, a German psychologist named Hermann Ebbinghaus spent years testing his own memory. He discovered something that changed how we understand learning forever.

He found that after learning something new, you forget it at a predictable rate. Within 24 hours you forget about 50% of it. Within a week you forget about 75%. Within a month almost everything is gone.

This is called the Forgetting Curve.

But Ebbinghaus also discovered something hopeful. Every time you review the information just before you forget it, the forgetting curve resets — and becomes less steep. You forget more slowly each time.

This means:

First review: after 1 day
Second review: after 3 days
Third review: after 1 week
Fourth review: after 2 weeks
Fifth review: after 1 month

After 5-6 properly spaced reviews, the information moves from short-term to long-term memory. You remember it essentially forever.

What Is The SM-2 Algorithm?

Manually calculating when to review each flashcard would be impossible. That is why in 1987, a Polish researcher named Piotr Wozniak created the SM-2 algorithm — a mathematical formula that automatically calculates the perfect time to show you each flashcard.

SM-2 works like this. After you review a flashcard, you rate how well you remembered it:

Rating	Meaning
Forgot (0)	Complete blank — show again today
Hard (2)	Remembered but with difficulty
Okay (3)	Remembered with some effort
Good (4)	Remembered correctly
Easy (5)	Remembered instantly and perfectly

Based on your rating, the algorithm calculates exactly when to show you that card again. Cards you find easy get longer intervals. Cards you find hard come back sooner.

The result is a perfectly personalized review schedule for every card in your deck — automatically.

SM-2 vs Cramming — A Real Comparison

Imagine you have 200 flashcards for your Biology exam in 6 weeks.

Cramming approach: Review all 200 cards the night before. 4-5 hours of painful studying. Pass the exam. Forget 80% within 2 weeks.

Spaced repetition approach: Review 20-30 cards per day using SM-2. 15-20 minutes per day. Pass the exam with higher marks. Remember 80% permanently.

Same material. Fraction of the time. Much better results.

How To Use Spaced Repetition Effectively

Step 1 — Create Good Flashcards

The quality of your flashcards determines everything. Good flashcards have:

One concept per card — never put two ideas on one card
Simple language — if you cannot explain it simply, you do not understand it yet
Your own words — copying textbook text word for word does not work
Specific questions — "What is the function of mitochondria?" not "Tell me about cells"

Step 2 — Review Daily — Not Weekly

Spaced repetition only works if you review consistently. 20 minutes every day beats 3 hours once a week. Make it a daily habit — same time, same place.

Step 3 — Be Honest With Your Ratings

The algorithm only works if you are honest. If you rated a card "Easy" when you actually struggled, the algorithm will not show it to you soon enough — and you will forget it.

Step 4 — Start Early

Begin your flashcard decks on the first day of your semester — not two weeks before the exam. The spacing effect requires time to work. Starting early means by exam time you have already reviewed everything multiple times naturally.

Which Subjects Benefit Most From Spaced Repetition

Subject	Benefit	Examples
Medicine	⭐⭐⭐⭐⭐	Anatomy, drugs, symptoms
Law	⭐⭐⭐⭐⭐	Cases, definitions, statutes
Language learning	⭐⭐⭐⭐⭐	Vocabulary, grammar rules
Biology	⭐⭐⭐⭐	Terms, processes, classifications
History	⭐⭐⭐⭐	Dates, events, people
Chemistry	⭐⭐⭐	Formulas, reactions, elements
Mathematics	⭐⭐	Better for practice problems
Essay subjects	⭐⭐	Better for concepts and arguments

The Mastery Levels

With consistent spaced repetition practice, every card you study goes through 4 stages:

New — You just added this card
Learning — You have reviewed it a few times
Reviewing — You remember it well, reviewing every few weeks
Mastered — You have reviewed it enough times that it is in long-term memory (21+ day intervals)

The goal is to move all your cards to Mastered before your exam. If you start early enough, this happens naturally — without any cramming.

Try It Today

Focus Flow has a full spaced repetition flashcard system built in, using the SM-2 algorithm. You can create decks, add cards, and start reviewing in minutes.

Your future self — sitting in the exam room, remembering everything clearly — will thank you for starting today.

Visit focusflowstudy.com to get started. Free forever.