ShadowFlow - Speaking Practice
Turn YouTube into lessons
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
ShadowFlow turns YouTube videos into living language lessons.
■ Watch with karaoke subtitles
Subtitles highlight word by word in sync with the video, so you never lose your place. Tap any line to jump to that scene.
■ Tap any word you don't know
The dictionary opens instantly. Save words with one tap — review them as flashcards, hear the pronunciation, and jump back to the exact scene where each word appeared.
■ Practice speaking with shadowing (MAX)
Record your own voice line by line and compare with the original. With headphones, your voice plays in the right ear and the original in the left. Pronunciation scoring shows exactly which words didn't come through, and rhythm bars compare your timing with the original.
■ A shared pool of subtitles (Pro)
Subtitles created by users are shared in a pool — once someone transcribes and fixes a video, everyone can learn from it. New subtitles are created on the desktop web version (kotomori.app/shadowflow).
■ Plans
- Free: watch subtitles you created, word list
- Pro: unlimited access to the shared subtitle pool + folders
- MAX: everything in Pro + shadowing practice
Available in English, Japanese, Spanish, Simplified Chinese, Korean, French, and German.
Subscriptions renew automatically unless cancelled at least 24 hours before the end of the period. Manage or cancel anytime in your App Store account settings.
Terms of Use: https://kotomori.app/terms
Privacy Policy: https://kotomori.app/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
ShadowFlow now runs on iPad. In landscape the video sits beside the transcript, so you can read along without the player taking over the screen.
Found a video with no subtitles? You can now request them — when someone creates them, they show up for everyone.
The developer, Daichi Tanabe, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Contact Info
- User Content
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Daichi Tanabe
- Size
- 5.8 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 6 more
- English, French, German, Japanese, Korean, Simplified Chinese, Spanish
- Age Rating
16+
- 16+
- Contains
Unrestricted Web Access
User-Generated Content
- In-App Purchases
Yes
- ShadowFlow MAX (Yearly) $129.99
- ShadowFlow Pro (Monthly) $6.99
- ShadowFlow Pro (Yearly) $59.99
- ShadowFlow MAX (Monthly) $14.99
- Copyright
- © kotomori