Comparison

Language Reactor vs Fastlingo

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 through the power of music with interactive lessons based on your favorite songs. This app offers real-time lyric exercises, vocabulary building, and progress tracking to make language acquisition engaging and effective. It's an immersive alternative to traditional study methods.

Highlights
  • Personalized music-based courses
  • Real-time lyric exercises
  • Offline learning mode
  • Adaptive difficulty
  • Vocabulary builder
  • Progress tracking
Features
Read full description

Discover Sounter, the ultimate spanish learning app that transforms how you learn languages through the power of music. Whether you are diving into italian language learning, mastering german language learning, exploring a french learning app experience or ready to learn portuguese, Sounter makes every lesson feel like your favorite playlist. It's like language reactor but with music. WHY SOUNTER Experience a new way to learn languages that adapts to your taste and your pace. Sounter leverages your favorite songs to teach vocabulary, pronunciation and cultural context—all without traditional drills or textbooks. You won’t just memorize words; you’ll sing them, repeat them and internalize them naturally. KEY FEATURES • Personalized music-based course: turn any song into an interactive lesson • Extensive multilingual catalog: Spanish, French, German, Italian, Portuguese and more • Real-time lyric exercises: complete lyrics while listening and get instant feedback • Offline learning mode: download videos and lyrics to practice anywhere • Adaptive difficulty: lessons adjust to your level, from beginner to advanced • Vocabulary builder: tap on any word to see definitions, examples and pronunciation • Progress tracking: monitor your streaks, mastered words and completed songs UNIQUE BENEFITS • Engage with authentic content: learn from real music instead of artificial examples • Boost retention: scientific evidence shows music enhances memory and recall • Learn faster: songs stick in your mind, so you acquire new vocabulary in minutes • Stay motivated: combining entertainment and education keeps you coming back • Cultural immersion: discover the nuances and slang of native speakers • Holistic skills: practice listening, reading, speaking and writing in one session HOW IT SOLVES YOUR PROBLEM Traditional apps can feel repetitive, disconnected or boring. Sounter solves this by embedding learning directly into songs you love. Say goodbye to rote flashcards and hello to immersive sessions that feel more like entertainment than study. You’ll notice progress in comprehension, pronunciation and confidence as you engage with meaningful, enjoyable content. SUPPORTED LANGUAGES • Spanish learning app: comprehensive courses for Latin America and European Spanish • French learning app: rich catalogue of chansons and pop hits for every learner • Italian language learning: immerse yourself in Italian hits, from classics to modern tracks • German language learning: extensive library of German-language songs to build fluency • Learn Portuguese: Brazilian and European playlists curated for learners WHY LEARN WITH MUSIC Music is proven to activate memory centers more effectively than traditional methods. When lyrics loop in your mind, you absorb grammar structures and vocabulary subconsciously. Sounter combines cognitive science and user-friendly technology to help you speak and understand new languages faster and more naturally than ever before. WHAT USERS LOVE • Effortless onboarding: start learning in seconds with no configuration • Seamless integration: link your favorite playlists or explore curated collections • Community-driven recommendations: discover trending songs that other learners enjoy • No hidden fees: access core content for free and upgrade anytime for premium features GET STARTED TODAY Ready to transform your language journey? Download Sounter now and join millions of learners who have unlocked new skills by singing along to their favorite tracks. Whether you’re seeking a top-tier spanish learning app, pursuing italian language learning goals, or exploring multiple languages at once, Sounter delivers an engaging, effective and fun experience. Embrace a smarter way to learn languages—your next favorite song is waiting.

About

Fastlingo

Learn languages through a structured progression of 10,000 carefully-graded sentences, each with concise grammar notes. This app offers a calm, consistent learning experience designed to prevent burnout and build confidence from beginner to intermediate levels.

Highlights
  • 10,000 graded sentences
  • Concise grammar notes
  • Continuous progression
  • Micro-learning design
  • Four languages available
  • Pronunciation practice
  • Voice recording and recognition
Features
Read full description

Fastlingo is built for calm, consistent progress. Instead of random phrases or grammar dumps, you learn through 10,000 carefully-graded sentences—each with a clear, concise grammar note. Every step adds just a bit more, so you keep moving without burnout, from A1 beginner to B2. Why Fastlingo works Continuous progression: Sentences are ordered so each one builds on the last—no jumps, no gaps. Micro-learning design: Small chunks of information that never overwhelm. Grammar that clicks: One focused explanation per sentence to make patterns stick. Largest organized set: 10k sentences curated for smooth, predictable growth. Four languages: German, Spanish, French, and English. How you’ll learn Start with very simple sentences. Read the brief grammar tip attached to each. Advance as you feel ready—each new sentence adds one manageable idea. Reach B2 with confidence built step by step. Perfect for self-learners who want structure without stress. • Learn Naturally: Build your speaking skills with real-life sentences. • Practical Grammar: Understand grammar in context, not as abstract theory. • Step-by-Step: Find your own pace and learn in a relaxed way. • Boost Retention: Key grammar concepts and vocabulary are repeated to ensure you retain them. • Modern method: Use the practice mode to make your learning more efficient. • Pronunciation: Record your own voice and compare it to the recording of the teacher or the text-to-speech voice. Also use voice recognition to test and improve your pronunciation. Terms of use (EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Language Reactor4 screens
Fastlingo4 screens

Verdict

The call

The clearest difference is ads: Language Reactor at none against Fastlingo's shown. Language Reactor also leads on ratings volume (3.7K vs 1) and iOS requirement (13.0 vs 15.0). Fastlingo's advantage is rating (5.0 vs 4.8). On price, update cadence, in-app purchases and monetization model 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 12 in-app purchases, starting at $3.49 per month and Fastlingo sells 1 in-app purchase, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Fastlingo holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Language Reactor has 3.7K ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Language Reactor ships an update every 3 weeks, Fastlingo every 4 weeks. The most recent releases landed on October 19, 2026 and October 10, 2026 respectively.

Scorecard4 real differences · 6 level
Language Reactor versus Fastlingo: the parameters behind the verdict, then further details
ParameterLanguage ReactorFastlingo
PriceFreeFree
Rating4.8 (3.7K ratings)5.0 (1 ratings) — better
Positive reviews66.1% of reviews—
Number of ratings3.7K — better1
Update frequencyEvery 3 weeks — betterEvery 4 weeks
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS13.0 — better15.0
Further details — not scored
Size120 MB38 MB
Age rating9+4+
DeveloperDavid GalarzaMihai Ionescu

Customer experience

Language Reactor

All ratings3,689 ratings
Positive96.7%
Neutral1.2%
Negative2.1%
Written reviews124 reviews
Positive66.1%
Neutral4.8%
Negative29.0%

Fastlingo

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Language Reactor

Reported bugs

2 issues
  • Repeated lessons and inability to progress
  • Automatic subscription charges without user consent

Requested features

3 requests
  • Add writing practice feature
  • Improve accent and pronunciation feedback
  • Provide more language options

Fastlingo

Not enough reviews yet to summarise bugs or requests.

In-app purchases

12 purchases

Language Reactor

Subscriptions11
  • Monthly7 Days trial$3.491 Month
  • Monthly7 Days trial$11.991 Month
  • Biannual7 Days trial$14.996 Months
Show 8 more
  • Sounter Premium Welcome Offer$19.991 Year
  • Annual Subscription7 Days trial$23.991 Year
  • Sounter Premium1 Month trial$24.991 Year
  • Biannual7 Days trial$40.496 Months
  • Biannual7 Days trial$50.996 Months
  • Annual Subscription7 Days trial$59.991 Year
  • Biannual7 Days trial$59.996 Months
  • Annual Subscription7 Days trial2 variants$69.991 Year
One-time1
  • Lifetime - Premium$99.99
1 purchases

Fastlingo

Subscriptions1
  • Renewable monthly subscription$3.991 Month

Questions

Is Language Reactor free?
Language Reactor is free to download, with in-app purchases available.
Is Fastlingo free?
Fastlingo is free to download, with in-app purchases available.
Which has better reviews, Language Reactor or Fastlingo?
Fastlingo is rated higher. Language Reactor averages 4.8 out of 5 from 3.7K ratings, while Fastlingo averages 5.0 from 1 ratings.
Do Language Reactor or Fastlingo have ads?
Fastlingo shows ads; Language Reactor does not.
Which is updated more often, Language Reactor or Fastlingo?
Language Reactor ships an update every 3 weeks, and Fastlingo every 4 weeks. Most recently, Language Reactor was updated on October 19, 2026 and Fastlingo on October 10, 2026.

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