Duosub - 動画で楽しく英語学習

Contains adsIn-app purchases
100+
Downloads
Content rating
Everyone
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About this app

■ Overview
Duosub is the ultimate tool designed for foreign movie, TV, and YouTube enthusiasts, as well as English learners.
By listening to native English and viewing English subtitles and Japanese translations while watching your favorite foreign movies, TV shows, and YouTube content, you can deepen your enjoyment of foreign videos and improve your English fluency.
Unlike other English learning methods, this app focuses on fun English learning and offers a wide range of features, including English subtitles, AI-powered Japanese translation, and an English vocabulary dictionary.

■ Main Features
① Subtitles and Japanese Translations for Foreign Movies and TV Shows
Duosub retrieves subtitle data for various movies and TV shows from one of the world's largest subtitle databases, allowing you to simultaneously display English subtitles and Japanese translations while watching videos.
Supporting a wide range of genres, from new releases to timeless classics, Duosub allows you to learn English through your favorite titles.
Watching movies and TV shows you're already familiar with in English allows you to smoothly understand the content and acquire native English in a fun and efficient way.

② Providing subtitles and Japanese translations to overseas YouTube channels
Just like with movies and TV dramas, you can simultaneously display the video, English subtitles, and Japanese translation, allowing you to learn native English through your favorite videos.
By browsing videos of your favorite genres, you can balance your hobbies with English learning.
Compared to movies and TV dramas, the videos are shorter, making them ideal for quick study in your spare time.

③ English Vocabulary Dictionary Function
You can check the meaning of a sentence by looking at the Japanese translation, but by using the English vocabulary function, you can also quickly check the meaning of words.
Check the meanings of words and strengthen your vocabulary.

■Target Users
People who want to enjoy foreign movies, TV shows, and YouTube videos more.
People who want to improve their listening skills and be able to watch foreign content without subtitles or Japanese translations.
People who want to be able to speak English but find it difficult to study abroad due to time or financial constraints.
People who are studying English but don't enjoy it and don't stick with it.

■Price
All features are free.
Ad-free access with a monthly subscription plan for ¥300.
(One-month free trial available)

Duosub transforms watching foreign content from mere entertainment into a fun and effective learning experience.
Learn new words and expressions, deepen your understanding of foreign content, and acquire native English through English subtitles.

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Terms of Use:
https://gows-llc.com/service/in-house/duosub/terms_of_use/

Privacy Policy:
https://gows-llc.com/privacy-policy/
Updated on
Nov 29, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection

What’s new

・翻訳精度が向上しました。
・一部端末におけるアプリ説明画面から遷移できない不具合を修正しました。

App support

About the developer
GOWS LIMITED LIABILITY COMPANY
info@gows-ktma.com
10-15, SHINSENCHO ANNEX SHINSEN 301 SHIBUYA-KU, 東京都 150-0045 Japan
+81 90-3472-8007