You study two hours every day, yet forget 80% of it by the following week. This fact, illustrated by the Ebbinghaus forgetting curve, is a reality most learners would rather ignore. Out of 730 hours of annual study time, roughly 584 hours worth of knowledge vanishes without sticking.
However, the right flashcard app can dramatically reduce this loss. The question is: which app should you choose? As of 2026, the three major flashcard apps are Memly, Anki, and Quizlet. Each has clear strengths and weaknesses, and picking the wrong one could waste months of learning progress.
In this article, we compare all three apps across five key dimensions to help you find the best fit for your learning style. If you want a broader overview of AI-powered memorization, start with What Is AI-Powered Memorization? A Complete Guide to How It Works, Its Effects, and the Best Tools.
Comprehensive Comparison of Three Flashcard Apps
Let's start with the big picture. The table below compares Memly, Anki, and Quizlet across five dimensions at a glance.
| Dimension | Memly | Anki | Quizlet |
|---|---|---|---|
| AI Features | AI auto-generation (PDF/image/video/audio) | Manual creation + partial AI via add-ons | Partial AI support (text-based) |
| Algorithm | FSRS 6.0 (4th generation) | SM-2 (1st generation) *FSRS switchable | Proprietary algorithm |
| Pricing (monthly) | Free / $5 / $10 | PC free / iOS $25 (one-time) | Free / $8 / $24 |
| Platforms | iOS / Android / Web | PC / iOS / Android (unofficial) | iOS / Android / Web |
| Ease of Use | Intuitive, even for beginners | Steep learning curve (maximum customizability) | Simple and familiar |
At first glance, every app appears to have trade-offs. But when you dig deeper into each dimension, clear differences emerge. Let's examine each one in detail.
AI Features Compared
In 2026, AI capabilities are the most important differentiator when choosing a flashcard app. The effort required to create cards directly affects how consistently you study, so the depth of AI features can make or break your learning outcomes.
Memly: Multimodal AI Auto-Generation
Memly's standout AI feature is its ability to automatically generate flashcards from PDFs, images, videos, and audio files. Simply upload a textbook PDF and it extracts key points into cards. It also supports lecture videos and audio materials, turning virtually any study resource into flashcards.
Beyond that, the AI automatically adjusts question difficulty based on the learner's comprehension level, reducing the risk of wasting time on questions that are too easy or getting discouraged by ones that are too hard. For more details on how AI flashcards work, see our AI Flashcard article.
Anki: Manual Creation + Community Add-ons
Anki is fundamentally a manual card-creation app. However, thanks to the strength of its open-source ecosystem, there are numerous add-ons (plugins) available, including integrations with ChatGPT and Claude that enable AI-assisted generation.
Anki's true strength lies in its unparalleled customizability. You can freely design card templates using HTML and CSS, and create cards with LaTeX formulas, text-to-speech, and virtually any format imaginable. The massive library of shared decks, particularly popular among medical students and language learners, is another major draw.
Quizlet: Text-Based AI Support
Quizlet supports AI card generation from text. Paste your notes or text and the AI automatically generates question-answer pairs. However, it does not support direct generation from PDFs, images, videos, or audio.
Quizlet's strength lies in its game-based study modes. With matching, test, and live competition modes, it offers engaging ways to study that help maintain motivation. It's especially well-suited for team-based learning and classroom use.
| AI Feature | Memly | Anki | Quizlet |
|---|---|---|---|
| AI generation from text | Supported | Via add-ons | Supported |
| AI generation from PDF | Supported | Not supported | Not supported |
| AI generation from images | Supported | Not supported | Not supported |
| AI generation from video | Supported | Not supported | Not supported |
| AI generation from audio | Supported | Not supported | Not supported |
| Auto difficulty adjustment | Supported | Not supported | Partial |
Differences in Memory Retention Algorithms
The scheduling algorithm that determines when to review is essentially the "brain" of any flashcard app. The performance of this algorithm determines how much you retain for the same amount of study time.
FSRS 6.0 (Used by Memly)
FSRS (Free Spaced Repetition Scheduler) 6.0 is a 4th-generation spaced repetition algorithm released in 2025. It optimizes 21 parameters based on individual learning data and uses a power-function forgetting curve model to predict memory decay with high precision.
According to the Open Memory Benchmark, FSRS 6.0 shows a significant improvement in memory prediction accuracy over SM-2, with data suggesting it can retain up to 74% more knowledge in the same study time (based on FSRS development team benchmark results). For technical details on FSRS 6.0, see our FSRS 6.0 explainer article.
SM-2 (Anki Default)
SM-2 is the algorithm developed by Piotr Wozniak in 1987 and is considered the foundation of spaced repetition. Its simple, robust design has been trusted by users for over 30 years. While Anki uses SM-2 as its default, it has offered the option to switch to FSRS (v4/v5) since 2024.
The limitation of SM-2 is its limited adaptation to individual memory patterns. It applies the same interval formula to all users, so it cannot fully account for individual differences in memory. However, its simplicity means it runs smoothly even on low-spec devices.
Proprietary Algorithm (Quizlet)
Quizlet uses a proprietary scheduling algorithm. While details are not publicly disclosed, it reportedly incorporates some machine learning as an adaptive algorithm. The lack of academic validation data makes it difficult to compare openly with FSRS 6.0 or SM-2.
| Attribute | FSRS 6.0 (Memly) | SM-2 (Anki Default) | Proprietary (Quizlet) |
|---|---|---|---|
| Year Developed | 2025 | 1987 | Undisclosed |
| Personalization | High precision with 21 parameters | Limited | Partial |
| Forgetting Curve Model | Power function (personalizable) | Fixed exponential function | Undisclosed |
| Academic Validation | Verified via open benchmark | 30+ years of track record | Limited |
| Open Source | Algorithm is public | Public | Closed source |
Pricing Comparison
While judging by price alone can be risky, choosing an app that fits your budget is still important. Let's take a detailed look at each app's pricing structure.
| Plan | Memly | Anki | Quizlet |
|---|---|---|---|
| Free Plan | Basic features (card limit applies) | PC version fully free (all features) | Ads shown, limited features |
| Paid Plan 1 | $5/month (expanded AI generation, ad-free) | iOS: $25 (one-time purchase) | Quizlet Plus: $8/month |
| Paid Plan 2 | $10/month (unlimited AI generation, all features) | -- | Quizlet Teacher: $24/month |
| Annual Cost (cheapest paid) | $60 | $25 (iOS one-time) | $96 |
How to Think About Cost-Effectiveness
Rather than looking at raw cost alone, it's important to think in terms of "retention efficiency per hour of study." If you study 40 hours a month, Memly's $5/month plan works out to about $0.13 per hour. Factor in the efficiency gains from FSRS 6.0, which reduces the study time needed to retain the same knowledge, and the effective cost drops even further.
Anki is the lowest-cost option if you use it on PC. All features are available for free, making it attractive for those who want to minimize their budget. However, the iOS app costs $25 as a one-time purchase, which is worth considering if smartphone-based study is a priority.
Supported File Format Comparison
How well an app can leverage your existing study materials has a significant impact on day-to-day learning efficiency.
| File Format | Memly | Anki | Quizlet |
|---|---|---|---|
| AI auto-analysis and card generation | Manual copy-paste | Not supported | |
| Images (JPG/PNG) | OCR + AI analysis for card generation | Can attach to cards (manual) | Can attach to cards (manual) |
| Video (MP4, etc.) | AI transcription + card generation | Not supported | Not supported |
| Audio (MP3, etc.) | AI transcription + card generation | Can attach to cards (manual) | Not supported |
| Word (DOCX) | AI analysis for card generation | Not supported | Not supported |
| CSV/TSV | Import supported | Import supported | Import supported |
Memly's multimodal support particularly addresses the need to "leverage existing study materials as-is." Whether it's textbook PDFs, lecture recordings, or photos of whiteboard notes, you can convert your existing resources directly into flashcards, dramatically reducing the time spent on card creation.
Who Each App Is Best For
Each of the three apps has an ideal user profile. Choose the one that matches your learning style.
Beginners and Efficiency Seekers: Memly
- First-time flashcard app users
- Those who don't want to spend time creating cards
- Learners who use diverse materials like PDFs, videos, and audio
- Those who want maximum efficiency through cutting-edge AI
- Anyone preparing for exams or language study who needs results fast
"Thanks to Memly's AI auto-generation, I uploaded my textbook PDF and had over 300 cards ready in minutes. Creating them manually would have taken days." -- Memly user (3rd-year medical student)
Customization Enthusiasts: Anki
- Those who want fine-grained control over card layout and design
- Users with HTML and CSS knowledge
- Learners who want to leverage community shared decks
- PC-based learners (all features available for free)
- Anyone who needs LaTeX formulas or specialized formatting
Anki's greatest appeal is its massive community, backed by over 20 years of history. Shared decks covering medicine, languages, programming, and more are available for free, and its add-on library is unmatched.
Team Learners and Gamers: Quizlet
- Those who want to study with classmates or groups
- Learners who enjoy game-style memorization
- Teachers who want to distribute study materials to students
- Anyone who stays motivated through matching games and live competitions
- Those who want a simple UI to get started quickly
Quizlet's live competition mode effectively boosts motivation across entire classrooms. It's particularly popular for high school English study and corporate team-building exercises.
For detailed head-to-head comparisons, see our Memly vs. Anki comparison and Memly vs. Quizlet comparison. For a broader look at AI flashcard apps, check out our Best AI Flashcard Apps ranking.
Frequently Asked Questions
Q. Do flashcard apps really work?
Yes. The effectiveness of spaced repetition has been repeatedly validated by cognitive science research. Reviewing at optimal intervals has been shown to improve retention rates by 2-3x compared to the same amount of unstructured study time. Modern algorithms like FSRS 6.0 further enhance this by optimizing review intervals to individual memory patterns.
Q. Can I switch from Anki to Memly?
Yes. Memly supports importing Anki deck files (.apkg). You can carry over the learning data you've accumulated in Anki and start leveraging Memly's latest AI features.
Q. Is the free plan sufficient?
All three apps allow basic flashcard study on their free plans. However, paid plans are recommended for full access to AI features. Anki is unique in offering all features for free on PC, making it the most cost-effective option for desktop-based learners. Memly starts at $5/month and Quizlet at $8/month for AI capabilities.
Q. Can I study only on my smartphone?
Memly and Quizlet both support iOS and Android and offer a comfortable smartphone-only experience. Anki has an official iOS version ($25 one-time) and an Android version (AnkiDroid, free), but advanced card editing and add-on management may require the PC version.
Q. Which app is best for exam preparation?
The best app depends on the type of exam. If you want to efficiently create cards from textbook PDFs, choose Memly. If you want to leverage existing shared decks for medical or language exams, choose Anki. If you want to study for exams as a team, choose Quizlet.
Q. Which is best for children?
For elementary and middle school students, Quizlet is the most approachable thanks to its rich game elements. For high school students and above preparing for serious exams, Memly is recommended for its ability to streamline card creation with AI. Anki's complexity makes it better suited for tech-savvy high school students and college learners.
Q. Is it okay to use multiple apps at once?
It's possible, but not recommended. Review schedules work best when managed in a single app, as it allows the algorithm to optimize effectively. Using multiple apps fragments your progress and risks reducing retention efficiency. We recommend committing to one app and using it for at least two weeks before making a judgment.
Conclusion: Which Flashcard App Is Right for You?
If you've read this far, you already have a clear picture of how the three apps differ and likely have an intuition about which one suits you best. That intuition is usually correct.
- For maximum learning efficiency with AI and the latest algorithm: Memly
- For customizability and leveraging community shared resources: Anki
- For team learning and game-based study: Quizlet
But here's the key insight: choosing matters less than starting. As the Zeigarnik effect in psychology demonstrates, we remember incomplete tasks more vividly than completed ones. That means right now, while you're still deciding, is the moment you're most primed to take action.
Channel that "I need to decide" energy into actually getting started. The smallest possible action is "download an app and create just 5 cards." It takes just five minutes. With Memly, you can simply upload one PDF and cards are generated automatically -- making it even easier.
Memly currently serves over 3,000 users and delivers a highly efficient learning experience powered by the FSRS 6.0 algorithm. Start with the free plan, experience the results firsthand, and then consider upgrading to a paid plan.