# LingoDew

> LingoDew is a mobile app for learning English and Japanese from real YouTube videos. It aligns subtitles at the word level, lets learners tap any word to see its meaning and save it to an unlimited wordbook, and schedules reviews with FSRS spaced repetition. Available for iOS and Android. Free to start with no account required: every video plays free, and the subtitle toolkit (tap lookups, saved words, review) is included with today's picks, the past two days, and videos released in the last 48 hours, plus 10 AI sentence explanations a day. Pro at US$4.99/month (local pricing shown in the App Store and Google Play) unlocks the subtitle toolkit across the entire library and unlimited AI explanations.

## What LingoDew does

- Streams English and Japanese videos from real YouTube creators, refreshed daily. LingoDew adds a learning layer on top of YouTube playback; it does not host the videos.
- Aligns every subtitle word to the audio. Tapping a word jumps to that exact moment and opens a dictionary card with readings and meanings.
- Saves each looked-up word to a wordbook together with the source sentence, its translation, and a link back to the video moment it came from.
- Reviews saved words with FSRS spaced repetition. Learners grade each card Forgot, Hard, Remembered, or Easy, and words advance through states until they reach Mastered. Overdue reviews accumulate without penalty.
- Labels every video by difficulty: A1 through C2 for English, N5 through N1 for Japanese.
- Lets learners tune subtitle font size, translation visibility, furigana and romaji helpers for Japanese, and per-state highlight colors.
- Tracks daily streaks, watch time, words saved, and reviews completed.

## Facts

- Name: LingoDew
- Category: language learning app
- Languages you can learn: English, Japanese
- App interface languages: 15, including English, Japanese, Chinese, Korean and Portuguese (Brazil)
- Platforms: iOS, Android
- Account required: no, only for cross-device sync or Pro
- Free tier: every video plays free; the subtitle toolkit — tap lookups, saved words, spaced-repetition review — is included with today's picks, the past two days, and videos released in the last 48 hours; 10 AI sentence explanations a day; unlimited wordbook
- Pro tier: US$4.99/month for the subtitle toolkit across the entire library and unlimited AI explanations; one subscription covers both platforms, cancel anytime. Local prices are shown in the App Store and Google Play.
- Video source: YouTube creators, refreshed daily
- Spaced repetition algorithm: FSRS
- Offline: videos require a connection; the wordbook and review cards are cached on device
- Support: support@lingodew.com
- Word states: every word carries one of four states — unseen (grey), queried (blue), learning (purple), mastered (green). Subtitles highlight unseen, queried, and learning words by default; mastered words are not highlighted. Each state's highlight can be toggled separately in subtitle settings.
- Word lifecycle: a word becomes reviewable after a second lookup or after 2 days; the first review promotes it from queried to learning; FSRS graduation promotes it to mastered, which switches its highlight off by default.

## Site

- [Home](https://www.lingodew.com/): the app — product overview, features, pricing, FAQ, and a few videos to try in the browser
- [Watch](https://www.lingodew.com/watch/): the latest Japanese and English videos with tappable subtitles, with links by level, topic and channel (every language version has its own /<locale>/watch/ page)
- Language versions of the same site: [简体中文](https://www.lingodew.com/zh-Hans/), [日本語](https://www.lingodew.com/ja/), [한국어](https://www.lingodew.com/ko/), [繁體中文](https://www.lingodew.com/zh-Hant/), [Tiếng Việt](https://www.lingodew.com/vi/), [Bahasa Indonesia](https://www.lingodew.com/id/), [Español](https://www.lingodew.com/es/), [Português (Brasil)](https://www.lingodew.com/pt-BR/), [ไทย](https://www.lingodew.com/th/), [Français](https://www.lingodew.com/fr/), [Deutsch](https://www.lingodew.com/de/), [हिन्दी](https://www.lingodew.com/hi/), [Türkçe](https://www.lingodew.com/tr/), [Русский](https://www.lingodew.com/ru/)
- [Research](https://www.lingodew.com/research/): original data measured from LingoDew's Japanese and English video corpus — speaking speed, vocabulary coverage by level, reduced forms — with free CSV downloads (CC BY 4.0)
- [Guides](https://www.lingodew.com/guide/): practical write-ups on learning Japanese and English from real videos
- [Chinese Guides](https://www.lingodew.com/zh-Hans/guide/): practical language learning guides written in Chinese
- [Japanese Guides](https://www.lingodew.com/ja/guide/): practical language learning guides written in Japanese
- [Tool Comparisons](https://www.lingodew.com/compare/): objective comparisons between LingoDew and tools like LingQ, Language Reactor, Migaku, Lingopie, Trancy, and Miraa, plus how LingoDew differs from the similarly named LingoDeer
- [Tutorials](https://www.lingodew.com/tutorials/): first-party explanations of how LingoDew works — word states and highlighting, difficulty grading, review scheduling (English)
- [Japanese videos](https://www.lingodew.com/japanese/videos/) and [English videos](https://www.lingodew.com/english/videos/): every video with its own page — a player with tappable, time-synced subtitles, translations, and word cards
- [Japanese videos by level](https://www.lingodew.com/japanese/listening/n5/) (JLPT N5-N1) and [English videos by level](https://www.lingodew.com/english/listening/a1/) (CEFR A1-C2), each split further by topic
- Videos by topic (for example [Japanese food](https://www.lingodew.com/japanese/topics/food/), [English food](https://www.lingodew.com/english/topics/food/)) and by YouTube channel, linked from every video page
- YouTube channels ranked by measured speaking speed at each level, with each channel's video count and share at that level and its main topics (for example [JLPT N4 channels](https://www.lingodew.com/japanese/channels/n4/), [CEFR B1 channels](https://www.lingodew.com/english/channels/b1/)); every ranking is also a CSV download and a Markdown page
- [Japanese words](https://www.lingodew.com/japanese/words/) and [English words](https://www.lingodew.com/english/words/): vocabulary heard in the videos, ordered by how often it is said, with lists per level (for example [JLPT N5 words](https://www.lingodew.com/japanese/words/n5/), [CEFR A1 words](https://www.lingodew.com/english/words/a1/)). Each word page has readings, meanings, part of speech, its frequency rank, the forms and phrases heard, and real example sentences that open the video at the moment the word is said
- [About](https://www.lingodew.com/about/): who runs LingoDew, where the videos come from, how difficulty labels and dictionary data work, and contact
- [FAQ](https://www.lingodew.com/faq/): common questions about the app, pricing, and the videos
- [For creators](https://www.lingodew.com/creators/): how LingoDew uses YouTube videos and how channel owners can request removal
- [Full text](https://www.lingodew.com/llms-full.txt): every research report, guide, tutorial and comparison in one plain-text file. Each of those pages also has a Markdown copy at its URL with ".md" in place of the trailing slash, e.g. https://www.lingodew.com/guide/fsrs-vs-anki-sm-2.md
- [MCP server](https://www.lingodew.com/mcp): read-only Model Context Protocol endpoint (Streamable HTTP, no auth) that AI assistants can connect to. Tools: find_videos (by language, level, topic or keyword), word_in_videos (how often a word is heard and its word page), channel_stats (a channel's measured speaking speed by level) and about_lingodew (these facts)
- [Privacy Policy](https://www.lingodew.com/privacy/)
- [Terms of Use](https://www.lingodew.com/terms/)

## Research

Original data from LingoDew's corpus of word-aligned YouTube subtitles. Free to reuse under CC BY 4.0 with credit to LingoDew; each report has CSV downloads.

- [How Fast Do People Speak on YouTube? Japanese and English Speaking Speed by Level](https://www.lingodew.com/research/youtube-speaking-speed-japanese-english/): Japanese YouTube videos are spoken at a median 6.3 morae per second and English videos at 183 words per minute. Beginner Japanese (JLPT N5) videos run 36% slower than N1 videos.
- [How Many Words Do You Need to Follow YouTube Videos? Coverage by JLPT and CEFR Level](https://www.lingodew.com/research/vocabulary-coverage-youtube-videos/): Recognizing 95% of the words in English YouTube videos takes the 3,814 most frequent words; in Japanese videos it takes 8,651. The top 1,000 words alone cover 86% of English and 78% of Japanese.
- [Gonna, Gotta, You Know: How Often Reduced Forms and Fillers Appear in Real English Videos](https://www.lingodew.com/research/english-reduced-forms-fillers-youtube/): “Gonna” appears 13.1 times per 10,000 words of English YouTube speech and shows up in 28% of videos, about 14 times as often as “wanna”. The filler “you know” is even more frequent, at 14.6 per 10,000 words.

## Tool Comparisons

- [LingoDew vs Language Reactor](https://www.lingodew.com/compare/language-reactor/): mobile immersion app with word-level audio alignment and FSRS review vs desktop Chrome extension for Netflix and YouTube.
- [LingoDew vs Migaku](https://www.lingodew.com/compare/migaku/): zero-setup mobile video immersion with built-in FSRS vs desktop browser extension sentence mining ecosystem into Anki.
- [LingoDew vs Lingopie](https://www.lingodew.com/compare/lingopie/): authentic everyday YouTube creator vlogs with word-level audio timestamps and free tier vs licensed commercial TV dramas behind a paywall.
- [LingoDew vs Trancy](https://www.lingodew.com/compare/trancy/): acoustic-aligned video listening with verified dictionaries and FSRS vs generative AI sentence breakdown and web article dual-reading.
- [LingoDew vs Miraa](https://www.lingodew.com/compare/miraa/): curated daily YouTube feeds with difficulty tiers and FSRS memory scheduler vs user-imported media links and microphone echo shadowing.
- [LingoDew vs LingQ](https://www.lingodew.com/compare/lingq/): leveled YouTube video listening with word-level audio sync and built-in FSRS review vs reading-first platform in 50+ languages with import-anything lessons.
- [LingoDew vs LingoDeer](https://www.lingodew.com/compare/lingodeer/): two unrelated apps with similar names — LingoDew trains English and Japanese listening with real YouTube videos, LingoDeer teaches about 20 languages through structured grammar lessons.

## Tutorials

- [How Word Highlighting Works in LingoDew: Four States, from Unknown to Known](https://www.lingodew.com/tutorials/word-states-explained/): why every word carries one of four states, how the states progress on their own, how LingoDew's design relates to LingQ, and how to tune each highlight in settings.

## Guides

- [FSRS vs Anki SM-2: Why Modern Spaced Repetition Beats 1980s Algorithms](https://www.lingodew.com/guide/fsrs-vs-anki-sm-2/): comparing the modern DSR-based FSRS scheduler with classic SM-2, explaining ease factor hell and video vocabulary retention.
- [The Best Apps to Learn Japanese from YouTube](https://www.lingodew.com/guide/best-app-to-learn-japanese-from-youtube/): an objective evaluation of browser extensions and mobile apps for YouTube Japanese immersion by subtitle precision, JLPT grading, and SRS. JLPT N5.
- [How to Choose an Immersion Learning App for English](https://www.lingodew.com/guide/immersion-learning-app-for-english/): moving from formal textbook rules to natural connected speech through comprehensible input, video immersion, and audio alignment. CEFR A2.
- [How to Use YouTube for JLPT Listening Practice](https://www.lingodew.com/guide/how-to-use-youtube-for-jlpt-listening/): a level-by-level strategy (N5-N1) for turning authentic YouTube videos into JLPT listening practice without getting lost in colloquial speed. JLPT N5.
- [Train and Errand Japanese: What You Actually Hear Around Tokyo](https://www.lingodew.com/guide/train-and-errand-japanese-what-you-actually-hear/): commuter Japanese is a small set of words in predictable sentences; learning 乗る, 買う and 仕事 through easy-Japanese videos. JLPT N5.
- [Why "What I Eat in a Day" Vlogs Are Perfect Japanese Listening Practice](https://www.lingodew.com/guide/why-what-i-eat-in-a-day-vlogs-work-for-japanese-listening/): food vlogs recycle a small set of verbs and adjectives in short natural sentences, which makes them close to ideal listening material. JLPT N5.
- [The N5 Daily-Life Words You Actually Hear in Japanese Videos](https://www.lingodew.com/guide/n5-daily-life-words-you-actually-hear-in-japanese-videos/): how textbook N5 word lists differ from real speech, using 食べる, ご飯 and 起きる as examples. JLPT N5.
- [How to Practice N5 Japanese Listening with Real YouTube Videos](https://www.lingodew.com/guide/how-to-practice-n5-listening-with-real-youtube-videos/): a method for building N5 listening skill with everyday Japanese vlogs — what to watch, how to work through a clip, and what to skip. JLPT N5.
- [How to Practice Beginner English Listening with Real YouTube Videos](https://www.lingodew.com/guide/how-to-practice-beginner-english-listening-with-real-youtube-videos/): a method for building beginner English listening with real YouTube vlogs — what to watch, how to work through a clip, and what to skip. CEFR A2.
- [Why "Day in My Life" Vlogs Are Perfect English Listening Practice](https://www.lingodew.com/guide/why-day-in-my-life-vlogs-work-for-english-listening/): the genre's fixed day structure recycles a small set of verbs and time markers in short natural sentences, which makes it near-ideal beginner listening. CEFR A2.
- [Textbook English vs the English You Actually Hear in Videos](https://www.lingodew.com/guide/textbook-english-vs-the-english-you-actually-hear-in-videos/): how spoken English compresses going to into gonna and want to into wanna, what fillers signal, and how to train your ear on the real forms. CEFR A2.
- [Coffee Shop English: What You Actually Hear When You Order](https://www.lingodew.com/guide/coffee-shop-english-what-you-actually-hear-when-you-order/): the scripted loop of a coffee order — what can I get you, for here or to go, you're all set — and why it is the best first real-world listening test. CEFR A1.
- [What Is Comprehensible Input? How to Learn Japanese from Real Videos](https://www.lingodew.com/guide/what-is-comprehensible-input-and-how-to-use-it-for-japanese/): Stephen Krashen's comprehensible input explained for Japanese learners — why raw anime fails and how to find i+1 videos. JLPT N5.
- [Comprehensible Input for English Listening: The Practical YouTube Guide](https://www.lingodew.com/guide/comprehensible-input-for-english-listening/): applying Krashen's comprehensible input and the 95-98% vocabulary rule to real YouTube English listening. CEFR B1.
- [How to Remember Japanese Vocabulary from Real Videos](https://www.lingodew.com/guide/how-to-remember-japanese-vocabulary-from-videos/): a context capture loop — meet a word in a video, save it with its sentence and audio moment, review with FSRS — plus corpus counts for which words are worth it. JLPT N5.
- [Why Native Japanese Sounds So Fast (and How to Catch Up)](https://www.lingodew.com/guide/why-native-japanese-sounds-so-fast/): four processing reasons real Japanese feels fast — no word spaces, inflected endings, casual contractions, spelling-based decoding — and the training for each. JLPT N4.
- [Japanese Contractions: What Native Speakers Actually Say](https://www.lingodew.com/guide/japanese-casual-speech-contractions/): the systematic contractions of casual Japanese — てる, ちゃう, とく, なきゃ — with real corpus lines and a counting drill. JLPT N4.
- [Can You Learn Japanese from Anime?](https://www.lingodew.com/guide/learn-japanese-from-anime/): the three gaps between anime Japanese and everyday speech, what transfers (phonemes, reaction words, stamina), and the kids'-show → teacher-vlog → raw-vlog bridge. JLPT N4.
- [Japanese Filler Words: The えっと, あの and なんか That Blur Real Speech](https://www.lingodew.com/guide/japanese-filler-words/): what each filler — えっと, あの, なんか, まあ, そうだね, とりあえず, やっぱり — signals, a real corpus line, and the word-level replay drill that makes them transparent. JLPT N4.
- [Language Reactor Alternatives on Android and iPhone](https://www.lingodew.com/guide/language-reactor-alternatives-on-android-and-iphone/): Language Reactor has no phone app; Trancy, Linglass, Migaku, Lexirise, Jolii and LingoDew compared by platform, what you can watch, word lookup, review and price.
- [How to Watch YouTube with Dual Subtitles on Your Phone](https://www.lingodew.com/guide/how-to-watch-youtube-with-dual-subtitles-on-your-phone/): the YouTube app shows one caption track at a time; the apps and the no-install browser option that show two subtitle lines with tap-to-look-up on Android and iPhone.
- [Where to Find Japanese Videos Sorted by JLPT Level](https://www.lingodew.com/guide/japanese-videos-sorted-by-jlpt-level/): leveled native video libraries, channel rankings by level, official JLPT listening samples and level-based lesson channels, and why no video level is official.
- [Cheaper Alternatives to Migaku for Learning Japanese](https://www.lingodew.com/guide/cheaper-alternatives-to-migaku-for-japanese/): Migaku's 2026 prices next to the free Yomitan, asbplayer and Anki stack, Language Reactor, LingoDew and Satori Reader, by which part of Migaku each replaces.
- [Comprehensible Input Apps and Sites for Japanese, Compared](https://www.lingodew.com/guide/comprehensible-input-apps-for-japanese/): listening and reading input sources (LingoDew, Comprehensible Japanese, Satori Reader, LingQ, Tadoku, NHK NEWS WEB EASY) by input type, leveling and price.
- [How We Really Learn Languages: Comprehensible Input Explained](https://www.lingodew.com/guide/how-we-really-learn-languages/): why years of classes rarely produce fluency — Krashen's learning vs. acquisition, i+1, the 98% vocabulary rule and the affective filter — with five steps to start today; includes a short explainer video.

## Native Guides (Chinese & Japanese)

- [如何用 YouTube 练习日语听力：从 N5 到听懂原声的实用指南](https://www.lingodew.com/zh-Hans/guide/zenme-yong-youtube-xue-riyu/): 进行可理解输入，攻克日常口语连读与缩略。
- [看视频学英语用什么软件？主流双语字幕工具横评与手机端高效工作流](https://www.lingodew.com/zh-Hans/guide/kan-shipin-xue-yingyu-app/): 手机端双语字幕工具横评与基于 FSRS 的生词复习闭环。
- [YouTubeで英語学習を継続するコツとおすすめの勉強法【初級〜中級向け】](https://www.lingodew.com/ja/guide/youtube-de-eigo-gakushuu-osusume/): 日常Vlogを活用した実践的リスニング上達法と音の脱落・短縮対策。
- [【2026年】動画で学べる英語リスニングアプリ比較：字幕・単語帳・復習機能で選ぶ](https://www.lingodew.com/ja/guide/eigo-listening-app-hikaku/): 字幕の同期精度、FSRS単語復習、スマホの使いやすさから主要アプリを徹底比較。
- [英语听力怎么练：从听懂慢速到看懂原声的三步路线](https://www.lingodew.com/zh-Hans/guide/yingyu-tingli-zenme-lian/): 按水平选材、三遍精听、跟读收尾的完整听力路线，把碎片时间变成有效输入。
- [JLPT 听力怎么练：按级别选材料，别再拿真题硬磨](https://www.lingodew.com/zh-Hans/guide/jlpt-tingli-zenme-lian/): 从 N5 到 N1 的视频选材路线与三遍精听流程，真题与真实语料六四开。
- [看动漫学日语真的有效吗？动漫日语和"活人日语"的差距在哪里](https://www.lingodew.com/zh-Hans/guide/kan-dongman-xue-riyu/): 动漫台词与日常口语的三个差距拆解，与从幼教动画过渡到真人 Vlog 的方法。
- [旅游日语速成：出发前用真实视频磨耳朵的四周计划](https://www.lingodew.com/zh-Hans/guide/lvyou-riyu/): 按场景选视频的四周磨耳朵计划，听懂车站广播、店员招呼和餐厅告知。
- [英语单词怎么记：查完就忘的真正原因和语境记词法](https://www.lingodew.com/zh-Hans/guide/yingyu-danci-zenme-ji/): 查词、原声绑定、FSRS 间隔复习的语境记词闭环，与高频动词优先的选词标准。
- [英语听力跟不上原速？先分清你卡在哪一层](https://www.lingodew.com/zh-Hans/guide/yingyu-tingli-genbushang-yuansu/): 词汇、辨音、处理速度三层听力瓶颈的自查方法与分层对策。
- [英语连读听不懂？把最常见的连读现象磨进耳朵](https://www.lingodew.com/zh-Hans/guide/yingyu-liandu/): 连结、缩略、弱读、同化四类连读规则与词级定点重播、跟读训练法。
- [映画で英語学習は効果ある？字幕の付け方と「生の英語」への近道](https://www.lingodew.com/ja/guide/eiga-de-eigo-gakushuu/): 脚本英語と自然な会話英語の違いを整理し、映画関連動画を中間ステップにする上達ルート。
- [英語の料理動画でリスニングと語彙を同時に鍛える【B1向け】](https://www.lingodew.com/ja/guide/ryouri-douga-de-eigo/): 調理動詞が自然に反復される料理動画の仕組みと、おすすめチャンネルと聞き方の型。
- [シャドーイングの正しいやり方【初心者〜中級】素材選びと3ステップ](https://www.lingodew.com/ja/guide/shadowing-tadashii-yarikata/): 素材が難しすぎることと音の把握なしの模倣という失敗原因と、正しい手順と素材選び。
- [TOEICリスニング対策【Part別】アナウンサー英語だけでは伸びない理由](https://www.lingodew.com/ja/guide/toeic-listening-taisaku/): Part3・4で失点する本当の原因と、試験対策と実力養成を両立させる学習法。
- [英単語の覚え方：映像で出会った単語を忘れない方法](https://www.lingodew.com/ja/guide/eitango-no-okaekata/): 映像で出会った単語を文脈・音声・例文ごと保存し、FSRS間隔反復で復習する仕組み。
- [英語が聞き取れない理由は3つだけ：原因別の対処法](https://www.lingodew.com/ja/guide/eigo-ga-kikitorrenai-riyuu/): 語彙不足・音の変化・処理の遅さの3つの壁のセルフチェックとそれぞれの対策。
- [ネイティブ英語が速く聞こえる本当の理由は「音のつながり」](https://www.lingodew.com/ja/guide/eigo-on-no-tsunagari/): リンキング・リダクション・短縮の3種類の音の変化の体系整理と、単語単位リプレイによる訓練法。