Rubi - Dual Subtitle Player
Dual subtitles for learners
Free
An extension that adds a second language of subtitles to the video you are already watching. Drag the subtitle anywhere you like.
Rubi is a Safari extension that adds a second line of subtitles to videos you watch in Safari.
It leaves the site's own subtitles untouched and adds one more language underneath. Listen in English while reading both English and Japanese subtitles at the same time.
SUPPORTED SITES
- YouTube
- Netflix
- Disney+
GETTING STARTED
1. Open a supported site in Safari and tap "aA" in the address bar
2. Choose "Manage Extensions" and turn Rubi on
3. Tap Rubi in the same menu and choose "Always Allow"
Open the app and these steps are shown with illustrations. You only set this up once.
WHAT IT DOES
- Shows a second language on top of the subtitles the service already displays
- Drag the subtitle with your finger to place it wherever you like
- Keeps showing while the video is in full screen
WHO IT IS FOR
- Language learners who want to check meaning without pausing
- Anyone studying Korean, Spanish or another language through film and television
- Listeners who only need help with the lines they missed
Rubi does not stream or provide any video. Playback happens entirely in Safari, under your own account. The subtitles it shows come from the subtitle data each site already serves to you while you are signed in. Rubi does not store, export or share that data.
A Netflix or Disney+ subscription is required for those services. YouTube works for free.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- Added support for Amazon Prime Video.
- Fixed the wrong sub-subtitle language being selected on Netflix when opening a different title.
- The sub-subtitle row now shows the remembered language name.
- Fixed subtitles from the previous title lingering on Disney+ after switching.
The developer, Shinichiro Yamashita, 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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Shinichiro Yamashita
- Size
- 1.2 MB
- Category
- Education
- Compatibility
Requires iPadOS 15.0 or later.
- iPad
Requires iPadOS 15.0 or later. - Mac
Requires macOS 26.2 or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPad
- Languages
- English
- Age Rating
16+
- 16+
- Contains
Unrestricted Web Access
Advertising
- Copyright
- © 2026 Shin