The gold-standard spaced-repetition flashcard app with community decks for every language.
AppsTools Free BeginnerIntermediateAdvanced
vocabulary
Details
Free on desktop, Android and web; the iOS app is a one-off paid purchase that funds the project. The interface is dated and the options are overwhelming at first, but nothing beats it for retaining vocabulary over years. Most effective when you stop grinding premade decks and start mining sentences from things you actually read or watch.
Tells you the difficulty and exact vocabulary of specific anime, games and novels.
WebsitesTools Free IntermediateAdvanced A2โC1
vocabularyreadingimmersion
Details
Its killer feature is per-media word lists: look up a specific show or novel, see how many words it uses and what percentage you already know, then pre-study that deck before you start. The built-in SRS is fast and keyboard-driven. It is free but rough around the edges โ sparse documentation, an opinionated review algorithm, and a small one-person-project feel โ and it assumes you have already got past the beginner stage.
The modern starter Anki deck: 1,500 core words with audio and clean sentence cards.
Tools Free Beginner A1โA2
vocabularyreadinglistening
Details
Built specifically to replace the ageing Core 2k/6k decks, with hand-checked sentences, native audio, pitch-accent marking and no broken formatting. Free on GitHub. It is deliberately small โ the point is to get you to the level where you can start mining your own words from real material within a few months, not to be your whole vocabulary plan.
OCRs manga into selectable text so pop-up dictionaries work on the speech bubbles.
Tools Free IntermediateAdvanced
readingvocabularyimmersion
Details
Runs OCR over manga pages and produces an HTML reader where the text is real selectable text overlaid on the artwork, which means Yomitan works on it. That turns manga from a hard-to-look-things-up format into one of the most accessible ways to read Japanese. Free and open source, but it is a command-line Python tool that you point at files you already own, so expect some setup and no content included.
Open database of 13M example sentences with translations across 400+ languages.
WebsitesTools Free BeginnerIntermediateAdvanced
readingvocabularygrammar
Details
A collaborative, Creative Commons-licensed corpus you can search for real usage of a word or download in bulk to build your own decks. It is the raw material behind Clozemaster and countless Anki decks rather than a study tool in itself. Sentences are contributed by volunteers, so quality and naturalness vary โ prefer sentences from native contributors and cross-check anything surprising.
Hover-over pop-up dictionary for reading Japanese web pages, with one-click Anki cards.
Tools Free IntermediateAdvanced
readingvocabularyimmersion
Details
The maintained successor to Yomichan, which was discontinued in 2023 โ Yomitan is the version to install now, and it is actively developed, free and open source (Chrome, Firefox, Edge, and Android via Kiwi-style browsers). Hover any word to get readings, definitions, pitch accent and audio, then send the whole sentence to Anki as a mining card. Setup is fiddly: you must download and import dictionary files yourself, and the Anki integration needs the AnkiConnect add-on.
Hear how a word is really said, searched across millions of YouTube clips.
ToolsWebsites Free IntermediateAdvanced
pronunciationlistening
Details
Type a word or phrase and it plays back real YouTube clips of people saying it in context, across 25 languages plus sign languages, so you get natural intonation and regional variation rather than an isolated dictionary recording. Free, donation-supported, no account needed. Complements Forvo: Forvo for single words, YouGlish for phrases and prosody.
Use an AI chatbot as a patient, free-ish conversation and grammar partner.
Tools Freemium BeginnerIntermediateAdvanced
speakingwritinggrammarvocabulary
Details
Modern assistants (ChatGPT, Claude, Gemini) will roleplay a scenario at your level, correct your writing with explanations, generate graded reading, and hold voice conversations โ endlessly patient and available at 2am, which no tutor is. Free tiers are enough for text practice; voice modes generally need a subscription. The caveats are real: models are noticeably weaker and more error-prone in lower-resource languages, they tend to produce bland textbook register rather than how people actually speak, and they will not correct you unless you explicitly ask them to.
SRS for grammar points, N5 to N1, with links out to the best explanation of each.
WebsitesAppsTools Freemium BeginnerIntermediateAdvanced A1โC1
grammarreading
Details
Fills the gap Anki and WaniKani leave: it drills grammar in cloze sentences and, for every point, links to the relevant page in Tae Kim, Genki, Imabi and others so you can read a real explanation before reviewing. There is a permanent free tier plus a 30-day full trial; Premium is $5/month or $150 lifetime, which is cheap for what it covers. It assumes you already have kana and some vocabulary, and it is a review tool rather than a first-time teacher.
Fill-in-the-blank sentence drills for vocabulary after you know the basics.
AppsTools Freemium IntermediateAdvanced A2โC1
vocabularyreadinggrammar
Details
Built on Tatoeba sentences, it drills words in context by frequency band across 50+ languages and 170+ language pairings, with a genuinely generous free tier. It explicitly starts where beginner apps end, so it is the natural 'what now?' answer for someone who finished a Duolingo tree. Sentences are crowd-sourced and occasionally awkward or oddly specific, and it teaches nothing about grammar explicitly.
Crowd-sourced pronunciations of nearly any word by native speakers.
DictionariesTools Freemium BeginnerIntermediateAdvanced
pronunciationlistening
Details
Around 6 million words recorded by native speakers across 400+ languages, usually with several accents per word so you can hear regional variation. Free to search on the site; the paid tiers are aimed at API users and bulk audio downloads. Indispensable for names, place names and anything a TTS voice would mangle โ many learners wire it directly into Anki for card audio.
The most complete Android kanji app: custom sets, writing practice, offline.
AppsTools Freemium BeginnerIntermediateAdvanced
readingwritingvocabulary
Details
Lets you build study sets by JLPT level, grade, frequency or your own list, with flashcards, multiple-choice quizzes, writing challenges and a built-in dictionary โ all offline. The free version covers the first few JLPT levels; a single in-app purchase (around $12) unlocks everything permanently, with no subscription. Android only, and the sheer number of options takes a while to navigate.
Dual subtitles and click-to-look-up on Netflix and YouTube.
Tools Freemium IntermediateAdvanced
listeningreadingvocabularyimmersion
Details
A Chrome extension that shows target-language and native subtitles simultaneously, lets you click any word for a definition, replay a line, and save phrases for review. The free tier already covers dual subs, dictionary lookups and the CEFR-graded video catalogue; Pro (about $6/month) adds machine translation, speech recognition and better AI lookups. It transforms passive Netflix time into study time, but you need enough of a base โ roughly B1 โ for subtitle mining to beat just watching.
Read and listen to real content while tracking every word you know.
AppsTools Freemium BeginnerIntermediateAdvanced A2โC1
readinglisteningvocabularyimmersion
Details
Import podcasts, articles or ebooks, tap unknown words for definitions, and LingQ tracks your known-word count over time. The free tier caps how many saved words you can keep, so serious use means paying (~$13/month or less annually). The interface is clunky and the built-in SRS is weaker than Anki, but the reading-plus-audio workflow with 50+ languages is hard to replicate elsewhere.
Click any word while reading the web to translate it and make a flashcard.
ToolsWebsites Freemium IntermediateAdvanced
readingvocabulary
Details
A browser extension plus web reader covering 100+ languages: click a word or drag across a phrase, get an inline translation, and it becomes a flashcard automatically. The free tier gives unlimited single-word translations but caps phrases and AI explanations at 10 a day; Premium is $6/month. Simpler and cheaper than LingQ or Migaku if all you want is frictionless reading of articles and ebooks.
Record yourself and get free human feedback on your pronunciation.
AppsTools Freemium BeginnerIntermediate
speakingpronunciationlistening
Details
A 501(c)(3) nonprofit: you shadow native audio, record your own version, and a real human coach returns feedback โ 10 free submissions a month, unlimited for about $20/month, with full scholarships for anyone who needs one. Covers French, Spanish, Chinese, Japanese, Korean, German, Italian, Portuguese, Russian and English. It only fixes pronunciation and delivery, so it complements rather than replaces conversation practice.
Turns Netflix, YouTube and web pages into Anki-style sentence cards.
ToolsApps Paid IntermediateAdvanced
immersionvocabularyreadinglistening
Details
The heavyweight immersion toolkit: one-click sentence mining with audio, screenshot and definitions, plus its own SRS and known-word tracking, for 11 languages including Japanese, Korean, Mandarin and the major European ones. A 10-day free trial then a subscription (roughly $10/month). Overkill unless you are committed to a sentence-mining routine โ if that describes you it saves hours a week, otherwise Language Reactor's free tier is enough.
Mnemonic-driven SRS that takes you through 2,000 kanji and 6,000 words in order.
AppsTools Paid BeginnerIntermediate A1โB2
readingvocabulary
Details
Radicals build into kanji which build into vocabulary, all on a spaced-repetition schedule you cannot rush โ that enforced pacing is exactly why it works for people who bounce off self-managed Anki decks. Levels 1โ3 are free; after that it is $9/month, $89/year or $299 lifetime (lifetime goes on sale most Decembers). Downsides: you cannot skip kanji you already know, the pace is fixed at roughly 1.5 years to finish, and it teaches readings rather than how to use the words in sentences.