The Science Behind Spaced Repetition Systems
You study for hours and forget everything in days? The problem isn’t effort — it’s timing. The Spaced Repetition System (SRS) solves this with over a century of cognitive science. Discover how Affex uses this algorithm to beat Anki and Noji.
Table of Contents
- The Forgetting Curve: The Invisible Enemy
- Hacking Memory with Spaced Repetition
- How Affex Flashcards Perfect the Algorithm
- The Results Speak for Themselves
- Frequently Asked Questions
- Conclusion
The Forgetting Curve: The Invisible Enemy
In 1885, Hermann Ebbinghaus discovered that your memory follows an exponential decay curve. Without review, you forget:
- 50% in 1 hour
- 70% in 24 hours
- 90% in 1 week
This is the Forgetting Curve. It explains why cramming works for the exam but fails afterwards. Your brain discards unreinforced information as “noise.”
Hacking Memory with Spaced Repetition
Spaced repetition combats the Forgetting Curve: you review at the exact moment before forgetting.
Each successful recall sends a signal to your brain: “This is important. Keep it.”
Typical schedule:
- Review 1: +1 day
- Review 2: +3 days
- Review 3: +7 days
- Review 4: +21 days
With each recall, the interval increases. Information migrates from short-term memory to permanent long-term storage.
How Affex Flashcards Perfect the Spaced Repetition Algorithm
Anki and Noji popularized SRS flashcards, but have problems: Anki is complex (high learning curve), Noji is too basic.
Affex uses the SM-2 algorithm (SRS gold standard) with modern, friction-free interface.
1. Smart Scheduling
Affex calculates, doesn’t guess. Based on your assessment:
- Easy card? Review in 1 month
- Hard card? Review tomorrow
You spend time only on what you need. Result: 50% more efficiency.
2. Integrated Active Recall
Unlike re-reading or highlighting (passive methods), Affex forces your brain to retrieve the answer before showing it. This mental effort creates permanent neural connections.
3. Mobile-First Without Friction
Study during breaks in your day: bus, line, waiting room. No complexity of “preparing” a session. Consistent daily habit = long-term retention.
The Results Speak for Themselves
Research on spaced repetition proves:
- 200% more retention long-term vs. massed study
- 30-50% less time for the same mastery
- Permanent knowledge that lasts years
Frequently Asked Questions
What is the SM-2 algorithm?
Super Memo 2, developed in 1987. Calculates optimal intervals based on your performance on each flashcard. It’s the SRS gold standard used by Affex, Anki, and other apps.
Is Affex better than Anki?
Depends on your profile. Anki is powerful but complex (great for advanced users). Affex balances power + simplicity, ideal for those who want to start quickly without complicated configurations.
How much time per day do I need to study?
15-30 minutes daily is sufficient. Consistency beats volume. SRS ensures you review only what’s necessary.
Does spaced repetition work for any subject?
Yes. Languages, medicine, law, programming, history — any memorization-based content benefits.
Can I use physical flashcards with SRS?
Yes, with the Leitner Method (boxes). But apps automate calculations, notifications, and adjustments, saving time and increasing precision.
Conclusion
Studying the traditional way is renting knowledge. With spaced repetition, you own permanent knowledge.
Whether for medicine, languages, or certifications, Affex transforms studying into predictable scientific system.