Best Mandarin Flashcards App: Free Options That Actually Work in 2026

If you have ever searched for “best mandarin flashcards app,” you have probably ended up drowning in App Store screenshots, Reddit arguments, and affiliate roundups that rank every paid app above every free one. This article takes a different line. We compare the free Mandarin flashcard apps that genuinely work in 2026, with no subscription required to do the thing the app is supposed to do. We also explain the algorithm question (FSRS versus SM-2) that almost nobody talks about, because it is the single biggest predictor of whether your daily review produces long-term vocabulary.

We build ReadDeck, so we are not neutral. We have used every app on this list, and we will tell you where ReadDeck wins, where it loses, and which other app to pick if ReadDeck is the wrong shape for your study habits.

What makes a Mandarin flashcard app actually good

Most “best flashcards app” lists rank apps by interface polish or by download count. That ranking misses the three properties that actually determine whether a Mandarin flashcard app works:

1. A real spaced repetition algorithm. Random drilling feels productive for a week and then burns out. A spaced repetition scheduler picks the cards you are about to forget and shows them at exactly that moment.
2. Tonal audio on every word. Mandarin is a tonal language. mā, má, mǎ, and mà are four different words. A flashcard that shows only the characters trains your eyes, not your ears.
3. Vocabulary from real reading. Mass-importing a 6,000-card HSK list feels efficient. The retention rate is brutal because you have no context for any of those cards. A flashcard app that grows vocabulary from sentences you actually read produces dramatically better recall.

Everything else is packaging. App icon design, streak notifications, daily quote widgets - these do not move the needle on whether you remember wǒ yào qù mǎi yī bēi kāfēi (I want to go buy a cup of coffee) in six months.

The algorithm question (FSRS versus SM-2 versus Leitner)

The single most important thing a flashcard app does is decide when to show you each card. The three approaches in widespread use in 2026 are the Leitner box (1972), SM-2 (1987), and FSRS (2022).

• Leitner boxes. Cards move between physical or virtual boxes based on whether you got them right. Crude, but it works for small decks. Most gamified vocabulary apps use a Leitner-style approach under the hood.
• SM-2. The SuperMemo algorithm Anki used from 2007 to 2023. Each card has an “easiness factor” that gets nudged on every review. SM-2 is elegant and dramatically better than Leitner. It is also “pretty arbitrary” - it does not actually model the forgetting curve and its intervals were calibrated on one person’s review history in the 1980s.
• FSRS. The Free Spaced Repetition Scheduler, published in 2022 by Jarrett Ye and now maintained under the open-spaced-repetition GitHub organisation. FSRS models each card’s memory state as three numbers (difficulty, stability, retrievability), fits its parameters to your review logs, and reaches the same recall target using 20-30 percent fewer daily reviews. FSRS became a built-in Anki option in Anki 23.10 (November 2023) and is the default for new Anki users from 2024 onwards.

For a deep dive on FSRS, see our FSRS explained guide. The short version is that FSRS is the best free, open-source spaced repetition scheduler available, and any Mandarin flashcard app worth using in 2026 either ships FSRS, ships SM-2 (acceptable, slightly worse), or ships nothing that deserves the name “spaced repetition.”

The 5 best free Mandarin flashcard apps

Here is how the five best free Mandarin flashcard apps compare in 2026. Pricing is approximate and varies by region; verify in-app before subscribing.

ReadDeck is the only app on this list that is genuinely free end-to-end, including the spaced repetition scheduler. Anki is free on desktop but charges for the iOS app. Pleco’s flashcard module is a paid add-on to a free dictionary. Quizlet, Memrise, and HelloChinese all have meaningful free tiers but lock the spaced repetition features behind their paid subscriptions.

ReadDeck: flashcards that grow from your reading

ReadDeck is the offline Mandarin reader we ship because we hit the same walls with every other app on this list. The design philosophy is simple: open a story, read, tap any word you do not know, and let the app handle the flashcards from that point on.

Reading-first vocabulary. ReadDeck ships with three Chinese folk tales (守株待兔, 拔苗助长, 乌鸦喝水) plus the ability to import any .txt file. Every word you mark as Unknown becomes a flashcard, complete with the sentence you found it in. The story is the deck.

FSRS 3.0 built in. ReadDeck uses the same FSRS scheduler that Anki now ships as default. You do not have to configure it. The algorithm figures out when each word is about to be forgotten and shows it to you just before. For Mandarin, where most cards are common characters like 的 (de) or 我 (wǒ) and a long tail of rare ones, the FSRS per-card memory model makes a noticeable difference.

Tonal audio on every word. Every word in ReadDeck’s library has tap-to-play audio with correct tones. You can also replay the full sentence. For a tonal language, this is the difference between recognising mā (mother), má (hemp), mǎ (horse), and mà (to scold) by sound.

Bottom-curtain word details. Tapping any word opens a bottom curtain with the pinyin (nǐ hǎo), the meaning, the audio, and an “Unknown” button to add it to your review queue. The interaction model is one-thumb friendly.

No account, no cloud, no subscription. ReadDeck is free. It works offline. It does not require an account. All your reading progress, marked words, and review history live on your device.

Hands off to audio lessons. If you use Audio Deck, the audio lessons ship with synchronised transcripts. You can read along, mark words you missed, and feed them into the same FSRS queue as your ReadDeck stories. One review queue, two input sources.

The honest weaknesses: ReadDeck ships for Android only today. iOS support is planned. The library is small (three folk tales plus your imports) compared to Anki’s thousands of community decks. There are no add-ons, no custom card templates, and no handwriting practice.

For a deeper comparison, see our Anki versus ReadDeck for Mandarin article.

Anki: the gold standard, with the right deck

Anki is the reference spaced repetition app for language learning. It is the right answer if you want full control over every part of your study system.

Strengths. Free on Windows, macOS, and Linux. Open source. SM-2 or FSRS scheduling (FSRS is now the default for new users). Thousands of community Mandarin decks on AnkiWeb, covering HSK 1-6, frequency lists, classical Chinese, handwriting practice, and specialised vocabulary. Total customisation - card templates use HTML and CSS, and hundreds of add-ons extend every part of the app. Sync across devices via AnkiWeb (free).

Weaknesses for Mandarin beginners. Setup is the first hurdle. A first-time user can easily spend an hour installing Anki, choosing a deck, configuring card templates, and adding audio before reviewing a single card. Manual deck curation is a separate skill. Anki is not a reader, so the “Mining” workflow is another step between you and your study. Anki encourages a high-volume card habit that produces burnout for many learners (“anki burnout” is its own search term).

When Anki is the right choice. You already know how to use Anki and have a working system. You want classical Chinese, specialised vocabulary, or handwriting practice. You want full control over card schemas and review logic. You have the discipline to set up add-ons, curate decks, and review 30+ minutes a day.

Pleco: dictionary plus flashcards, no reading flow

Pleco is the best Chinese-English dictionary ever made for a phone, and its paid SRS add-on turns it into a competent flashcard system.

Strengths. The dictionary is fully free with no ads, no subscription, and no upsells. You can look up characters by radical, by drawing on the screen, by OCR through the camera, and by voice. The SRS add-on costs around $8 to $14 one-time and supports custom card creation from any word you look up. Audio is excellent on every entry.

Weaknesses for the flashcard use case. Pleco’s flashcard workflow requires you to look up words one at a time and create cards manually. There is no reading flow - you cannot open a Chinese article in Pleco and start marking words. The SRS add-on is paid. There is no community deck ecosystem like Anki’s.

When Pleco is the right choice. You want a dictionary first and flashcards second. You study from a textbook or a paper list and want to turn each word into a card as you go.

Quizlet: easy but weak SRS

Quizlet is the most popular flashcard app by download count, and the most overrated for Mandarin.

Strengths. Beautiful interface. Easy to share decks with study groups. Massive library of user-contributed Mandarin decks, including most HSK lists. Free tier is genuinely usable for casual study.

Weaknesses. The free tier now limits study modes and shows ads. The advanced spaced repetition features are paywalled behind Quizlet Plus (from around $7.99/month). The base SRS is weaker than SM-2 or FSRS - Quizlet treats cards more like a queue than a memory model.

When Quizlet is the right choice. You study Mandarin casually, not as a primary goal. You need to share decks with a class or study group.

Memrise: community courses but limited customisation

Memrise sits between Quizlet and Anki on the spectrum - more structured than Quizlet, less powerful than Anki.

Strengths. Native-speaker video clips for thousands of common words. Structured courses aligned to CEFR levels (A1 through B2). A genuinely usable free tier with several thousand words of vocabulary courses.

Weaknesses. The free tier has been reduced over the last few years. Memrise Pro (from around $8.99/month) unlocks the full course library and offline mode. Custom card creation is limited.

When Memrise is the right choice. You are an absolute beginner who learns well from video and audio. You want a structured course rather than a self-curated deck.

HelloChinese: gamified beginner course

Strengths. Excellent gamified beginner experience with structured HSK-aligned lessons. Generous free tier with most lessons available. Native-speaker audio throughout. Handwriting practice.

Weaknesses. Caps at around intermediate (HSK 4). The free tier has ads and some locked content. Premium is from around $11.99/month.

When HelloChinese is the right choice. You are an absolute beginner who needs a structured first 6 months of study. You learn well from gamified exercises.

Decision tree: which app for which learner

If you are unsure, here is a quick decision tree based on the comparison above.

• You read Mandarin more than you review flashcards. ReadDeck is built for you. FSRS, bottom-curtain word details, free, offline.
• You already have an Anki habit and it works for you. Stay on Anki. Switch to FSRS in deck options. Do not break a working system.
• You want classical Chinese, specialised vocabulary, or handwriting. Anki with the right community deck.
• You want a dictionary first and flashcards second. Pleco + SRS, one-time payment.
• You study Mandarin casually with a class. Quizlet or Memrise free tier.
• You are an absolute beginner who needs structure. HelloChinese free tier for the first 6 months.

For a broader view of how flashcard study fits into a complete Mandarin learning routine, see the Mandarin vocabulary hub.

FAQ

What is the best free Mandarin flashcards app in 2026?

If you want a genuinely free end-to-end app with FSRS scheduling, tap-to-play tonal audio, and reading-driven vocabulary growth, ReadDeck is the strongest choice. If you want maximum customisation and a huge community deck library, Anki on desktop is the long-standing answer, with FSRS now built in.

Is ReadDeck really free?

Yes. ReadDeck has no paid tier, no subscription, no in-app purchases, and no ads. It is supported by the wider Mandarin Audio product line.

Does Anki still work for Mandarin?

Yes. Anki is still the most powerful flashcard app for Mandarin, especially if you want classical Chinese, specialised vocabulary, or handwriting practice. The recommendation in 2026 is to use FSRS as the scheduler (now the default for new users), not SM-2.

Should I use FSRS or SM-2?

FSRS. The benchmarks show FSRS reaches the same target retention with 20 to 30 percent fewer daily reviews. The saving compounds across years of study and across thousands of cards.

Which app is best for HSK prep?

For HSK 1-4, ReadDeck’s folk tales plus FSRS is sufficient and genuinely free. For HSK 5-6, pair Anki with ReadDeck: Anki for the specific HSK deck, ReadDeck for the reading practice that anchors those words to context. To benchmark where you stand before choosing a deck, run a free mock test at HSK Quiz - it scores you against the official pass mark and shows exactly which words or grammar points are costing you marks.

Try the best free Mandarin flashcards

If you read this far and you are the learner ReadDeck was built for, you know who you are. You want to read Mandarin more than you want to review flashcards. You bounced off Anki because the setup was too much. You want FSRS-quality reviews without configuring anything. You want tonal audio on every word. You want a free, offline, account-free app. Open ReadDeck and open the first folk tale. Tap any word. Let the FSRS scheduler take it from there.