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Screenshots

  • CaptionTube screenshot 1
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  • CaptionTube screenshot 4

About CaptionTube

Videos + Captions + Translation - Take Your English Learning to the Next Level CaptionTube is an app specialized in English learning that leverages YouTube video captions. By displaying English captions and Japanese translations simultaneously with a fully synchronized highlight feature, you can improve your English skills efficiently while having fun. ------------------------------------------- Key Features ------------------------------------------- ● Real-time Caption Synchronization ・Easy-to-read captions divided into sentences ・Auto-highlight captions based on video playback position ・Jump instantly to the corresponding scene by tapping a caption ・Word-by-word highlighting for detailed review ・Text search within captions to quickly find specific words or phrases ● Japanese Translation Feature ・Display Japanese translations of English captions with one tap (iOS 18+) ● Simple Operation ・Get captions instantly by entering a YouTube video URL or ID ・Intuitive interface that anyone can start using immediately ・Keyword search within the app ・Recommended channels feature (organized by beginner/intermediate/advanced levels) ・Playback history to quickly access previously watched videos ● YouTube Search Feature ・Display thumbnails, titles, view counts, and video duration in a list ・Play videos directly from search results ・Search history feature to quickly recall past searches ● Customizable Settings ・Adjust caption font size ・Change playback speed (0.25x to 2x) ------------------------------------------- Recommended For ------------------------------------------- ・ Those who want to learn English enjoyably through YouTube videos ・ Those who find English captions alone difficult to understand ・ Those who want to study repeatedly at their own pace ・ Those who want to learn English from their favorite YouTubers' videos ・ Those who want to make effective use of commuting time ・ English learners of all levels, from beginner to advanced

What’s new

Version 1.1.2 · Updated June 12, 2026

We have decided to discontinue this app. Thank you.

App privacy

The developer, Hironobu Saito, reported these privacy practices to Apple.

Data Not Linked to You

The following data, which may be collected but is not linked to your identity, may be used for the following purposes:

  • Usage Data: Product Interaction, Other Usage Data
  • Diagnostics: Crash Data

Used for: Analytics, App Functionality

Alternatives to CaptionTube

Looking for apps like CaptionTube? Here are 6 similar apps on the App Store. The highest rated is 英語チューブ - 動画で英語を覚えよう! (5.0/5), and all 6 are free to download.

CaptionTube vs. alternatives
App Rating Price Last updated Compare
CaptionTube – Free June 12, 2026
Swipelingo: Learn Japanese YT – Free Oct 10, 2026 Compare
Language Learning with Videos – Free Aug 1, 2026 Compare
英語チューブ - 動画で英語を覚えよう! 5.0 / 5 (1) Free Jul 23, 2025 Compare
Duosub - 動画で楽しく英語学習 – Free Oct 2, 2026 Compare
Favorite: Learn Languages 4.0 / 5 (1) Free Oct 9, 2026 Compare
Submate: Dual Subtitles for YT 5.0 / 5 (1) Free Aug 22, 2026 Compare

Compare CaptionTube with the top alternatives: ratings, updates, ASO score and keyword gaps →