Comparison

Duosub vs Lanbla

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Duosub

Features
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■概要 Duosubは、海外の映画・ドラマ・YouTube愛好家と英語学習者のために設計された究極のツールです。 海外の映画・ドラマ・YouTubeの中で自分の好きなコンテンツを見ながら、ネイティブの英語を聞き、英語字幕と日本語訳を確認することで、海外動画をより深く楽しみながらネイティブの英語を身につけることができます。 他の英語の学習方法とは異なり、楽しい英語学習にフォーカスしたこのアプリは、英語字幕の表示、AIによる日本語翻訳、英単語の辞書機能など、豊富な機能を提供します。 ■主な機能 ①海外の映画・ドラマへの字幕・日本語訳の提供 世界最大級の字幕データベースから様々な映画やドラマの字幕データを取得し、動画を再生しながら英語字幕と日本語訳を同時に表示することが可能です。 新作の映画・ドラマから不朽の名作まで豊富なジャンルに対応しており、好きな作品で英語を学習することができます。 すでに内容を知っている映画やドラマを英語で見れば、内容をスムーズに理解でき、楽しく効率よくネイティブの英語が身につきます。 ②海外YouTubeへの字幕・日本語訳の提供 映画・ドラマと同様に、動画・英語字幕・日本語訳を同時に表示することで、好きな動画でネイティブの英語を学ぶことができます。 自分が好きなジャンルの動画を閲覧することで、趣味と英語学習を両立できます。 映画やドラマと比べ、動画が短いため、隙間時間でのちょっとした学習に向いています。 ③英単語の辞書機能 日本語訳を見ることで、文章の意味を確認することができますが、英単語の辞書機能を利用することで、単語の意味もすぐに確認することが可能です。 単語の意味を確認し、語彙力も強化しましょう。 ■ターゲットユーザー ・海外の映画・ドラマ・YouTubeをより楽しみたい方 ・リスニング力を上げて、字幕や日本語訳なしで海外コンテンツを見れるようになりたい方 ・英語を喋れるようになりたいけど、時間や金銭的に留学するのが難しい方 ・英語を勉強しているが、楽しむことができず、長続きしない方 ■価格 ・全機能無料 ・月額¥300のサブスクプランへ加入することによって広告なしでご利用可能  (1ヶ月間の無料トライアルあり) Duosubを使えば、海外作品の鑑賞がただの娯楽ではなく、楽しく効果的な学習体験に変わります。 英語字幕を通じて、新しい単語や表現を学び、海外作品をもっと深く理解し、楽しくネイティブの英語を身につけましょう。 -- 利用規約: https://gows-llc.com/service/products/duosub/terms プライバシーポリシー: https://gows-llc.com/privacy

About

Lanbla

Features
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Practice real-life phrases and words again and again, with help from AI. Pick from 13 study languages, including English, Korean, Chinese, and Spanish, and learn through flashcard-style repetition. The app can be shown in 6 languages. ■ Key features ・Flashcard practice Practice phrases and words as cards. Tap "Reveal answer" to see the answer along with key words worth remembering. Hear the pronunciation with the speech button, and save any card to Favorites with one tap. ・Sentences made for you with AI Generate Enter a keyword, and AI writes example sentences matched to your study language, level, and what you've told it about yourself, grouped into folders by date and keyword. ・AI Review finds your weak spots Words you start missing are collected automatically in the "AI Review" folder, and drop out once your accuracy recovers. ・Favorites folders and memos Save phrases and words to your own folders, practice any mix you like, and add a memo to each. ・Built to keep you going The home screen shows your streak and last 7 days of practice, plus a "Yesterday's MVPs" ranking of the previous day. ・Read-aloud and voice settings Phrases and words are read aloud in a natural voice. Set the speed and voice (male/female) for each study language. ・Make it yours (paid plans) Choose the app's main color. Tell the AI about yourself in AI Customize (why you're learning, situations you care about), and AI Generate will fit you even better. ■ Languages Study (13): English / Korean / Chinese / Spanish / Japanese / French / Italian / German / Esperanto / Tagalog / Russian / Portuguese / Vietnamese Display (6): Japanese / English / Chinese / Korean / Spanish / French ■ How to use 1. Sign in with Apple or Google, then choose a study language and your current level. 2. Start practicing phrases or words. 3. Have AI write sentences from a keyword, or practice your weak words in "AI Review." ■ Plans and pricing Prices below are Japan prices. Prices for your country or region are shown in the In-App Purchases section of this page. You can keep using Lanbla on the free plan as long as you like. ・Free: Up to 50 practice questions a day each for phrases and words (10 per session), AI Generate once a day for up to 5 sentences. Includes ads. ・Lanbla Lite (¥1,100/month, Japan price incl. tax): Unlimited practice (100 per session), AI Generate twice a day for up to 10 sentences, no ads, 3 theme colors, 1 AI Customize slot per study language. ・Lanbla Pro (¥2,200/month, Japan price incl. tax): AI Generate 5 times a day for up to 10 sentences, 9 theme colors, 2 AI Customize slots. Otherwise the same as Lite. ・Lanbla Max (¥4,400/month, Japan price incl. tax): AI Generate 10 times a day for up to 10 sentences, all 15 theme colors including exclusive ones, 4 AI Customize slots. Otherwise the same as Lite. ■ About subscriptions ・Titles and length: Lanbla Lite / Lanbla Pro / Lanbla Max (each auto-renews monthly) ・Price: Lite ¥1,100/month, Pro ¥2,200/month, Max ¥4,400/month (Japan prices, incl. tax). Prices for your country or region are shown in the In-App Purchases section of this page. ・Lanbla Lite includes a 7-day free trial (shown in the app to eligible users). After the trial ends, it renews automatically at the Lite monthly price. ・Payment is charged to your Apple Account. Your subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period. ・To cancel (turn off auto-renew), go to Settings > [your name] > Subscriptions on your device. If you cancel during the free trial, you won't be charged. ・You can change plans within the app. ■ About Support You can support development from "Support" in the app (optional, one-time, ¥1,000 to ¥100,000; learning features stay the same). ■ Terms of Use and Privacy Policy Terms of Use: https://lanbla.com/legal/terms Privacy Policy: https://lanbla.com/legal/privacy ■ Contact Help and contact: https://lanbla.com/help

Screenshots

Duosub4 screens
Lanbla4 screens

Verdict

The call

The clearest difference is ads: Duosub at none against Lanbla's shown. Lanbla's advantage is update cadence (every 5 days vs every 3 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Duosub sells 1 in-app purchase, starting at $1.99 per month and Lanbla sells 10 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Duosub ships an update every 3 weeks, Lanbla every 5 days. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

Scorecard2 real differences · 4 level
Duosub versus Lanbla: the parameters behind the verdict, then further details
ParameterDuosubLanbla
PriceFreeFree
Update frequencyEvery 3 weeksEvery 5 days — better
AdsNo — betterYes
In-app purchasesYesYes
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.015.0
Further details — not scored
Size101 MB16 MB
Age rating4+4+
DeveloperGOWS LIMITED LIABILITY COMPANYRyutaro Okumura

In-app purchases

1 purchases

Duosub

Subscriptions1
  • チケット無制限プラン1 Month trial$1.991 Month
10 purchases

Lanbla

Subscriptions4
  • Lanbla Lite$6.991 Month
  • Lanbla Lite7 Days trial$6.991 Month
  • Lanbla Pro$12.991 Month
Show 1 more
  • Lanbla Max$29.991 Month
One-time6
  • Support ¥1,000$5.99
  • Support ¥2,000$11.99
  • Support ¥3,000$19.99
Show 3 more
  • Support ¥5,000$29.99
  • Support ¥10,000$59.99
  • Support ¥100,000$599.99

Questions

Is Duosub free?
Duosub is free to download, with in-app purchases available.
Is Lanbla free?
Lanbla is free to download, with in-app purchases available.
Do Duosub or Lanbla have ads?
Lanbla shows ads; Duosub does not.
Which is updated more often, Duosub or Lanbla?
Duosub ships an update every 3 weeks, and Lanbla every 5 days. Most recently, Duosub was updated on October 30, 2026 and Lanbla on October 24, 2026.

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