Comparison

Jolii vs Language Reactor

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Jolii

Learn languages by watching your favorite shows and videos from Netflix and YouTube. This AI-powered app creates personalized lessons, offers instant word translations, and provides AI chatbot practice for speaking and pronunciation.

Highlights
  • Learn from Netflix and YouTube videos
  • AI-powered personalized exercises
  • Instant word translation and pronunciation
  • AI chatbot for speaking practice
  • Pronunciation practice with music lyrics
  • Supports multiple languages
Read full description

Watch Netflix and YouTube with dual subtitles and learn a language from your favorite shows, directly inside Jolii. Log in to your own Netflix or YouTube account: no browser, no extension, not tethered to a desktop computer, completely mobile. See the language you're learning on top and your native language below, and tap any word for instant meaning, translation and pronunciation, without leaving your show. Jolii is an AI-powered language learning app that turns your favorite shows and videos into personalized language lessons. Key Features: ◆ Watch Your Way: Explore Jolii’s video library, paste a YouTube link, or connect your own Netflix account to bring your shows right into Jolii, in split-screen or full-screen mode. Get recommendations based on what you enjoy watching. ◆ AI-Powered Personalization: Jolii analyzes your chosen YouTube and Netflix content in real time, crafting custom exercises tailored to your language goals, vocabulary level, and learning style. ◆ Context-Based Learning: Unlike traditional methods that isolate words, Jolii focuses on learning within the natural context of YouTube videos, Netflix shows and music. This immersive approach fosters deeper understanding and better retention of vocabulary and grammar. ◆ Speaking Practice Anytime: Enhance your fluency and gain confidence in real conversations with Jolii's AI chatbot. Answer questions about the scene, step into a character's shoes (Roleplay), practice pronunciation by echoing native speakers (Shadowing), and get instant feedback on how you did. No pressure, no judgment — just practice. ◆ Improve Pronunciation with Music: Analyze song lyrics with Jolii, breaking them down into individual words and phrases. Practice pronunciation with phonetic transcriptions and gain a deeper understanding of the nuances of the language through music. ◆ Learn Multiple Languages with One Subscription: Expand your linguistic horizons with Jolii's expanding library, featuring courses in English, Spanish, French, German, Italian, Chinese, Korean, Japanese — and more on the way. A single Jolii subscription gives you access to every language, no separate purchases needed. Jolii is perfect for: √ Anyone tired of repetitive language drills that sound like real speech. √ Netflix and YouTube binge-watchers who want their screen time to count. √ Learners who want to speak, not just recognize words, and want real conversation practice built in. √Anyone who wants a mobile-first watching experience, without downloading a browser extension. Stop switching between apps and study tools. Download Jolii and start learning from content you love! Privacy Policy: https://www.jolii.ai/privacy-policy/ Terms of Service: https://www.jolii.ai/terms-and-conditions/

About

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.

Highlights
  • 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
Features
Read full description

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

Jolii4 screens
Language Reactor4 screens

Verdict

The call

The clearest difference is rating: Language Reactor at 4.9 against Jolii's 4.5. Language Reactor also leads on update cadence (every 4 days vs every 2 weeks). On price, ratings volume, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Jolii sells 6 in-app purchases, starting at $9.99 per month and Language Reactor sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Language Reactor holds the better App Store score, 4.9 against 4.5. Both are backed by a comparable volume of ratings — 4 and 8 respectively.

UpkeepUpdate frequency

Jolii ships an update every 2 weeks, Language Reactor every 4 days. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

Scorecard2 real differences · 8 level
Jolii versus Language Reactor: the parameters behind the verdict, then further details
ParameterJoliiLanguage Reactor
PriceFreeFree
Rating4.5 (4 ratings)4.9 (8 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings48 — better
Update frequencyEvery 2 weeksEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better16.4
Further details — not scored
Size150 MB55 MB
Age rating4+4+
DeveloperBetter Software Co PTE. LTD.Ilia Furtaev

Customer experience

Jolii

All ratings4 ratings
Positive75.0%
Neutral25.0%
Negative0.0%

Language Reactor

All ratings8 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

6 purchases

Jolii

Subscriptions6
  • 1 Month$9.991 Month
  • 1 Month(1-week free trial)7 Days trial$9.991 Month
  • 3 Months$24.993 Months
Show 3 more
  • 6 months.$44.996 Months
  • 12 months.$89.991 Year
  • 12 months.7 Days trial$89.991 Year
2 purchases

Language Reactor

Subscriptions2
  • Premium (Monthly)$7.991 Month
  • Premium (Annual)3 Days trial$59.991 Year

Questions

Is Jolii free?
Jolii is free to download, with in-app purchases available.
Is Language Reactor free?
Language Reactor is free to download, with in-app purchases available.
Which has better reviews, Jolii or Language Reactor?
Language Reactor is rated higher. Jolii averages 4.5 out of 5 from 4 ratings, while Language Reactor averages 4.9 from 8 ratings.
Do Jolii or Language Reactor have ads?
Neither Jolii nor Language Reactor shows ads.
Which is updated more often, Jolii or Language Reactor?
Jolii ships an update every 2 weeks, and Language Reactor every 4 days. Most recently, Jolii was updated on October 24, 2026 and Language Reactor on October 29, 2026.

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