Linglass: Dual Subtitles
Learn English & More by Video
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Linglass turns YouTube into the most natural way to learn a language — watch what you
love, with dual subtitles, and pick up words without it ever feeling like studying.
Tap any word in the subtitles to see what it means in context (not just a dictionary
definition), hear it pronounced by a native voice, and save it with one tap. Every saved
word comes back at the perfect moment with spaced-repetition flashcards, so it sticks.
DUAL SUBTITLES ON YOUTUBE
Watch any YouTube video with subtitles in your target language and your own, side by
side. Tap a word for an instant, context-aware translation.
CONTEXTUAL TRANSLATION + PRONUNCIATION
Get the meaning that fits the sentence, with phonetic transcription and native-voice
audio. Built for understanding, not just lookups.
AI GRAMMAR EXPLANATION
Select a sentence and get a clear, structured breakdown of the grammar — each
construction labelled with its CEFR / JLPT / HSK / TOPIK level, in your own language.
SMART FLASHCARDS (SPACED REPETITION)
Review saved words with the real video context — the sentence and the frame they came
from. The FSRS algorithm schedules each card right before you'd forget it.
TRACK YOUR PROGRESS
Streaks, a review heatmap and clear stats keep you coming back.
LEARN: English, Spanish, French, German, Italian, Portuguese, Russian, Japanese, Korean
and Chinese — with the interface in 20 languages.
FREE TO USE: 15 translations a day, 50 saved words, and AI grammar explanations every
month. PREMIUM removes the limits — unlimited translations, unlimited saved words and far
more AI grammar — with a 7-day free trial.
Watch. Click. Translate. Remember.
linglass.app · support@linglass.app
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://linglass.app/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Clearer subtitles when a video isn't in your language
When a YouTube video has no subtitles in the language you're learning, Linglass now tells you clearly — and offers a one-tap switch to a language the video does have, or AI subtitles where possible, instead of coming up empty. We also fixed cases where a video's language was detected incorrectly. Plus polish and fixes throughout.
The developer, Ilia Furtaev, 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:
- Contact Info
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Ilia Furtaev
- Size
- 60.9 MB
- Category
- Education
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Premium (Annual) $59.99
- Premium (Monthly) $7.99
- Copyright
- © 2026 Linglass