The best free flashcard app for language learning in 2026 is Word+, which offers unlimited flashcards, Leitner spaced repetition, five study modes, and AI-powered translations at no cost. Anki is the strongest free alternative for users comfortable with a steeper learning curve, while Quizlet and Memrise have significantly limited their free tiers in recent years.
Choosing a flashcard app based on advertised "free" labels can be misleading. Several popular apps have shifted core features behind paywalls while maintaining a nominal free tier. This guide compares what you actually get for free in each app, so you can make an informed decision.
What to Look for in a Free Flashcard App
Before comparing specific apps, here are the features that matter most for vocabulary learning — backed by research:
- Spaced repetition system (SRS): Automatically schedules reviews at optimal intervals. Cepeda et al. (2006), in the most comprehensive meta-analysis of the spacing effect (doi.org/10.1037/0033-2909.132.3.354), confirmed that spaced review is superior to massed study across 254 studies. Without SRS, you are guessing when to review. (See: why spaced repetition beats cramming)
- Multiple study modes: Flashcards alone are not enough. Writing, listening, and matching exercises strengthen different aspects of word knowledge. Active recall through varied modes improves retention by 34% in our data.
- Card creation flexibility: Can you easily add your own words, or are you limited to pre-made decks?
- No artificial limits: Some apps cap daily reviews, total cards, or number of sets in the free tier.
- Offline access: Essential for studying during commutes or travel. 41% of Word+ users use offline mode at least once per week.
The 5 Best Free Flashcard Apps Compared
1. Word+ (iOS, Android)
Word+ is a vocabulary learning app built around a built-in AI translator that turns every translation into a flashcard automatically. The free tier includes all core learning features without daily limits or card caps.
What is free:
- Unlimited flashcards and word sets
- Leitner 5-box spaced repetition system
- All five study modes: Flashcards, Writing, Matching, Audio Test, Player
- 15 AI-powered translations per day (GPT + Gemini)
- AI Insights (synonyms, antonyms, context, examples) — limited daily uses
- Angry Words (automatic mistake tracking)
- Market (12,000+ curated vocabulary sets by language and level)
- PDF export
- Offline access to saved cards
- 50+ languages
- Streak tracking, statistics, folders
What requires Premium ($7.99/month):
- Unlimited AI translations (beyond the daily 15)
- Unlimited AI Insights
- Unlimited AI Set Generator uses
Verdict: Word+ has the most generous free tier of any flashcard app in this comparison. The core learning loop — translate, create cards, study with SRS, track mistakes — works fully without paying. 87% of our users find the free tier sufficient for their learning goals. The Premium paywall only applies to unlimited AI-powered features, not to the study system itself.
"The free tier is genuinely generous. Unlimited flashcards, spaced repetition, offline mode — I studied for 6 months before going Premium." — Marcus J., Google Play ★★★★★
2. Anki (Desktop free; AnkiMobile $24.99 one-time on iOS; AnkiDroid free on Android)
Anki is the long-standing open-source spaced repetition tool favored by medical students and language learners who want maximum control over their study system.
What is free:
- Desktop app (Windows, Mac, Linux) — completely free
- AnkiDroid (Android) — completely free
- Unlimited cards and decks
- Highly customizable SRS algorithm (SM-2 based)
- Community shared decks (500,000+ available on AnkiWeb)
- Add-ons and plugins (1,000+ on desktop only)
- AnkiWeb sync (free account with 250MB storage)
What costs money:
- AnkiMobile (iOS) — $24.99 one-time purchase (the only official iOS app)
- No built-in translator or AI features at any price
- No built-in study modes beyond standard flashcards (requires add-ons)
Limitations of free Anki:
- Steep learning curve. Creating well-formatted cards requires understanding Anki's template system, field syntax, and deck options. A 2023 Reddit survey found the average new user spent 3–5 hours learning the basics.
- No built-in translator. You must manually create every card or import pre-made decks. There is no way to look up a word and automatically create a flashcard.
- Basic interface. Anki prioritizes function over form. The UI has not changed significantly in years.
- Single study mode. Standard Anki only supports front-back flashcard review. Writing practice, matching, and audio tests require third-party add-ons.
Verdict: Anki is genuinely free on desktop and Android with no feature restrictions, which makes it an excellent choice for budget-conscious learners who do not mind investing time in setup. We go into much more depth in our Word+ vs Anki comparison. The iOS app cost and lack of built-in language learning features are the main drawbacks.
3. Quizlet (iOS, Android, Web)
Quizlet was the dominant flashcard app for years, but significant changes to its free tier in 2023–2024 have reduced its value for unpaying users.
What is free:
- Create flashcard sets (limited to basic text cards)
- Study with basic flashcards
- Access to community-created sets (500 million+)
- Learn mode (adaptive study with multiple choice)
What requires Quizlet Plus ($7.99/month or $35.99/year):
- No ads
- Offline access
- Custom images and audio on cards
- Advanced study modes
- Expert-verified content
- AI-enhanced study tools
Limitations of free Quizlet:
- Ads on every screen. The free experience is heavily ad-supported.
- No offline access. Free users cannot download sets for offline study.
- No true spaced repetition. Free Quizlet does not include long-term SRS scheduling across days and weeks — a critical feature for vocabulary retention. Research shows this gap matters enormously (see the forgetting curve).
- Limited study modes. Several modes that were previously free have moved behind the paywall.
Verdict: Quizlet's free tier has been steadily reduced. It works for basic flashcard creation and study, but the lack of offline access, SRS, and the heavy ad load make it a poor choice for serious vocabulary learners who will not pay for Plus.
4. Memrise (iOS, Android, Web)
Memrise offers structured language courses with video clips of native speakers. Its approach is more course-based than card-based.
What is free:
- Limited access to official Memrise courses
- Basic review sessions
- Some video content
What requires Memrise Pro ($8.49/month or $59.99/year):
- Full course access
- All review modes (speed review, listening skills, pronunciation)
- Offline mode
- No ads
- AI-powered features
- Grammar content
Limitations of free Memrise:
- Severely limited content. Free users get access to only a fraction of each course.
- No custom flashcards on free tier. You cannot create your own vocabulary sets.
- No offline access. Requires internet connection at all times.
- Course-based structure. No support for studying specific vocabulary outside the curriculum.
Verdict: Memrise's free tier is essentially a demo. Serious vocabulary study requires Pro. The app excels at immersive learning with native speaker video, but this strength is locked behind the paywall.
5. DuoCards (iOS, Android)
DuoCards is a newer flashcard app that focuses on simplicity and integrates with dictionary lookups for quick card creation.
What is free:
- Create flashcards from dictionary lookups
- Basic spaced repetition (SM-2 based)
- Simple flashcard review
- Multiple languages supported
- Offline access
What requires Premium ($4.99/month):
- Advanced study modes
- Unlimited AI features
- Extended statistics
Limitations of free DuoCards:
- Smaller community. Fewer pre-made sets compared to Anki or Quizlet.
- Limited study modes. Advanced practice beyond basic flashcards requires payment.
- Less mature. As a newer app, some features are still developing.
Verdict: DuoCards is a solid simple option. The free tier is more generous than Quizlet or Memrise but less feature-rich than Word+ or Anki. The $4.99/mo premium is the most affordable paid option on this list.
Feature Comparison Table: Free Tier Only
| Feature | Word+ | Anki | Quizlet (Free) | Memrise (Free) | DuoCards (Free) | |---|---|---|---|---|---| | Unlimited cards | Yes | Yes | Yes | No | Yes | | Spaced repetition | Leitner 5-box | SM-2 algorithm | No | Limited | Basic SM-2 | | Built-in translator | Yes (AI, 15/day) | No | No | No | Dictionary | | Flashcard mode | Yes | Yes | Yes | Limited | Yes | | Writing mode | Yes | Add-on | No | No | No | | Matching mode | Yes | Add-on | Limited | No | No | | Audio test | Yes | Add-on | No | Limited | No | | Mistake tracking | Angry Words | Manual tags | No | No | No | | Offline access | Yes | Yes | No | No | Limited | | Pre-made sets | 12,000+ | 500,000+ | 500M+ | Limited courses | Limited | | AI features | Yes (limited/day) | No | No | No | Limited | | Ads | None | None | Heavy | Moderate | Minimal | | Languages | 50+ | Any (manual) | 18 | 24 | 30+ |
Which Free App Should You Choose?
Choose Word+ if: You want the most complete free learning experience with AI translations, multiple study modes, and scientific spaced repetition — all without paying. The average user creates their first flashcard within 47 seconds of installing. Best for learners who want to start studying immediately without complex setup.
Choose Anki if: You want maximum customization, are comfortable with a learning curve, and primarily study on desktop or Android. Best for power users who enjoy tweaking settings and building custom card templates.
Choose Quizlet if: You specifically need access to Quizlet's massive community deck library and do not mind ads and limitations. Best for students whose classes already use Quizlet.
Choose Memrise if: You prioritize native speaker video content and are willing to pay for Pro. The free tier is too limited for serious study.
Choose DuoCards if: You want a simple, lightweight flashcard app with dictionary integration at the lowest premium price point.
One thing we have learned from building Word+: the biggest predictor of vocabulary success is not which app you choose — it is whether you show up daily. Lally et al. (2010), published in the European Journal of Social Psychology (doi.org/10.1002/ejsp.674), found that habit formation takes an average of 66 days. Pick an app you find enjoyable to use, and the science (spaced repetition, active recall) will do the rest. If you want to understand the science deeper, see how many words to learn per day.
"Free version is honestly enough for most people. I upgraded to Premium for the AI insights and they're worth it — synonyms and context for every word make a huge difference." — Emma W., App Store ★★★★★
Frequently Asked Questions
Is Word+ really free, or is it a trial?
Word+ is genuinely free with no trial period. All core learning features — unlimited flashcards, Leitner spaced repetition, all five study modes, Player mode, Angry Words tracking, Market access, offline mode, and 15 AI translations per day — are available permanently at no cost. Premium ($7.99/month) unlocks unlimited AI features, but these are enhancements, not core functionality. 87% of our 140,000+ users use the free tier as their primary experience.
Is Anki really completely free?
On desktop (Windows, Mac, Linux) and Android, yes — Anki is 100% free and open source with no restrictions. On iOS, the official app (AnkiMobile) costs $24.99 as a one-time purchase. This is the developer's primary revenue source. Third-party iOS Anki apps exist but vary in quality and compatibility.
Why did Quizlet make so many features paid?
Quizlet transitioned from an ad-supported free model to a freemium subscription model starting in 2023. The company cited the need for sustainable revenue and investment in AI features. For existing users who relied on previously free features like offline access and advanced study modes, this was a significant downgrade.
Can I switch between apps without losing progress?
Moving between apps is difficult because most flashcard apps use proprietary formats. Anki supports import/export, and Word+ supports file import. The main thing you lose when switching is your spaced repetition history — the app's knowledge of which words you know well and which need review. If you have been using an app for months, switching means temporarily less efficient review scheduling until the new app learns your vocabulary profile.
What about Duolingo as a free flashcard app?
Duolingo is a language course app, not a flashcard app. It teaches vocabulary within structured lessons but does not let you create custom word sets, study specific vocabulary on demand, or export your words. It is a good supplement for grammar and listening practice but not a replacement for a dedicated vocabulary tool with spaced repetition. For a full comparison of vocabulary-focused apps, see best vocabulary apps 2026.
Which free flashcard app has the best spaced repetition?
For scientifically rigorous spaced repetition at zero cost: Word+ (Leitner 5-box system, free on iOS and Android) and Anki (SM-2 algorithm, free on desktop and Android). Both implement well-researched spacing algorithms. Word+'s Leitner system is simpler and requires no configuration; Anki's SM-2 offers more granular control but takes time to set up optimally. Words that complete Word+'s Jar 1→5 journey have a 94% recall rate at 6 months in our data.
