# Language Lab - Oto Reactor — Video Translator & Shadowing

> Video Translator & Shadowing (iPhone/iPad app by Alisher Fayzullaev.)

- Source: https://appshunter.io/ios/app/language-lab-oto-reactor/id6821612831 (this page in markdown: same URL + `.md`)
- Developer: [Alisher Fayzullaev](https://appshunter.io/developer/1855851596)
- Category: Education, Reference
- Price: Free
- Age rating: 9+
- Requires: iOS 18.0 · 19 MB
- Languages: Russian, Hindi, Vietnamese, American English, Arabic, Dutch, Danish, Hebrew, Indonesian, European Spanish and 16 more
- Released: 2026-10-28
- Data updated: 2026-11-05

## What is Language Lab?

Oto Reactor helps you learn a language from real YouTube videos with subtitles.

• Dual subtitles. Watch with the original subtitles and a translation into your language — tap a single word, see a translation above each phrase, or read the whole sentence.
• Words in context. Tap any word for its translation and save it to your vocabulary in one tap. On supported devices you also see what the word means in this exact sentence and its part of speech.
• Shadowing. Replay any sentence or pause after each one to repeat it out loud.
• Flashcard review. Saved words come back on a spaced-repetition schedule: 1, 3, 7, 14, 30, 60 and 120 days. Daily reminders keep you on track.
• 546 hand-picked videos in English, Spanish, French, German, Portuguese, Japanese, Italian, Korean and Chinese, sorted by level and topic — or paste a link to any YouTube video with subtitles.

Works with videos that have subtitles. Translation runs on your device: once a language is downloaded, it works without the internet. Watching videos needs an internet connection.

No account needed. Your vocabulary and progress stay on your device.

The app speaks 26 languages, including English, Spanish, French, German, Portuguese, Italian, Japanese, Korean, Chinese, Arabic and Hindi. Translations appear in your device's language by default.

Oto Reactor plays videos through the official YouTube player and is not affiliated with YouTube or Google.

Terms of Use: https://otoreactor.alfayzullaev.com/terms/
Privacy Policy: https://otoreactor.alfayzullaev.com/privacy/

## Is Language Lab safe?

Not enough ratings yet to assess Language Lab.

## Is Language Lab legit?

Language Lab - Oto Reactor appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Language Lab is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 1.0.1 — 2026-11-02

New Idioms button: find idioms and set phrases in any video, with meanings from open dictionaries (Wiktionary, WordNet) in 9 video languages. Japanese learners get ready-made Japanese meanings. Plus player fixes and improvements.

### 1.0 — 2026-10-28

No release notes.

## More apps by Alisher Fayzullaev

- [Spanish Reading - ReadLingua](https://appshunter.io/ios/app/spanish-reading-readlingua/id6755721145)
- [NYC Subway Map & Metro Guide](https://appshunter.io/ios/app/nyc-subway-map-and-metro-guide/id6815800021)

All apps by Alisher Fayzullaev: https://appshunter.io/developer/1855851596

## Related topics

[language lab](https://appshunter.io/ios/topics/language-lab)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-05.*