Penglai vs Language Reactor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Penglai
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蓬萊國小用於英文情境教學
Language Reactor
Learn languages by watching videos with dual subtitles and instant contextual translations. Save words, practice with spaced-repetition flashcards, and get AI-powered grammar explanations. Track your progress and master new languages through engaging content.
- Dual subtitles on YouTube
- Contextual word translation and pronunciation
- AI grammar explanations with CEFR levels
- Spaced-repetition flashcards
- Progress tracking with stats and heatmap
- Support for multiple languages
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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. 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
Screenshots
Verdict
The clearest difference is in-app purchases: Penglai at none against Language Reactor's 2. Penglai also leads on iOS requirement (12.0 vs 16.4). Language Reactor's advantage is update cadence (every 4 days vs every 28 months). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Language Reactor sells 2 in-app purchases, starting at $7.99 per month. Penglai asks for nothing beyond the download.
Penglai ships an update every 28 months, Language Reactor every 4 days. The most recent releases landed on October 26, 2026 and October 31, 2026 respectively.
| Parameter | Penglai | Language Reactor |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.9 (9 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 9 — better |
| Update frequency | Every 28 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 359 MB | 55 MB |
| Age rating | 4+ | 4+ |
| Developer | JienHua Gu | Ilia Furtaev |
In-app purchases
Penglai
No in-app purchases
Language Reactor
- Premium (Monthly)$7.991 Month
- Premium (Annual)3 Days trial$59.991 Year
