Comparison

Language Reactor vs Cube

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

Head to head
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 vocabulary naturally.

Highlights
  • Dual subtitles on YouTube
  • Contextual word translation & pronunciation
  • AI grammar explanations
  • Spaced-repetition flashcards
  • Progress tracking
  • Supports 9 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

About

Cube

Read full description

Cube-Vision is a speedcubing timer that records and reconstructs your solves using a vision algorithm, providing stats and splits while you practice with your main. Cube-Vision is completely free. No sign in, no ads, and all videos stay on your device unless you choose to share them. HOW IT WORKS: 1. Follow the scramble given and start inspection. Tap and hold the screen to start the timer, or simply place your hands face down as if starting a competition timer. Cube-Vision watches your hands starts the timer when you take your hands off the table. 2. Solve the cube! The front facing camera records your solve. 3. Review: Once the moves have been extracted from the video Cube-Vision compiles a solve breakdown with per stage move counts and TPS. ALGORITHM TRAINER 1. Select and algorithm set and press start training. 2. You will be shown a case on the screen. Solve that case on your own cube. Each of your moves will be played onto the displayed cube until it is solved. 3. View your stats. Compare your most recent performance to your average performance for that case with recognition time, execution time, and TPS. 4. Repeat: Perform a U2 flick to move on to the next case and you'll be able to quickly practice all of your algorithms.

Screenshots

Language Reactor4 screens
Cube4 screens

Verdict

The call

The clearest difference is in-app purchases: Cube at none against Language Reactor's 2. On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Language Reactor sells 2 in-app purchases, starting at $7.99 per month. Cube asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 4 days. The most recent releases landed on October 15, 2026 and October 1, 2026 respectively.

Scorecard1 real difference · 9 level
Language Reactor versus Cube: the parameters behind the verdict, then further details
ParameterLanguage ReactorCube
PriceFreeFree
Rating4.9 (7 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings7 — better—
Update frequencyEvery 4 daysEvery 4 days
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPad — betteriPhone
Requires iOS16.416.1 — better
Further details — not scored
Size55 MB113 MB
Age rating4+4+
DeveloperIlia FurtaevDamian Piech

In-app purchases

2 purchases

Language Reactor

Subscriptions2
  • Premium (Monthly)$7.991 Month
  • Premium (Annual)7 Days trial$59.991 Year
None

Cube

No in-app purchases

Questions

Is Language Reactor free?
Language Reactor is free to download, with in-app purchases available.
Is Cube free?
Cube is free to download, with no in-app purchases.
Do Language Reactor or Cube have ads?
Neither Language Reactor nor Cube shows ads.
Which is updated more often, Language Reactor or Cube?
Language Reactor ships an update every 4 days, and Cube every 4 days. Most recently, Language Reactor was updated on October 15, 2026 and Cube on October 1, 2026.

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