Comparison

Language Reactor vs Smart Dictionary

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 YouTube videos, podcasts, and movies. This app provides seamless AI-powered translations and an AI tutor to explain slang and idioms. Practice pronunciation with real-time transcriptions and sentence-by-sentence subtitles.

Highlights
  • Learn from real YouTube videos, podcasts, and movies
  • AI-powered translations in 80+ languages
  • AI Assistant for instant explanations
  • Shadowing practice for pronunciation
  • Sentence-by-sentence synchronized subtitles
  • Part-of-speech highlighting for grammar
Features
Read full description

You know the words. Real speech still gets away from you. Sound familiar? Fast. Blurred together. Half the sounds gone. With PlayLingo you learn from what you actually enjoy: movie scenes, YouTube, podcasts, books. Lingo, your AI assistant, explains any word or phrase, and you start to understand real speech. WATCH: movies, shows and any YouTube video • Learn from movie scenes, cartoons, interviews and your favorite YouTubers • Open any YouTube video, or start with collections picked for your level, from A1 to C2 • Bilingual subtitles, line by line, with a translation that fits the scene LISTEN: podcasts you'll actually understand • Podcasts in the language you're learning, from short lessons to real conversations • Every episode gets subtitles: tap a word, see the translation, break down the phrase READ: books, on the page or out loud • Classics and short stories in the language you're learning • Read line by line with translation, or let a natural voice read the book to you on a walk BRING YOUR OWN • Any book, document or photo of a page becomes a lesson, and your own audio and video get subtitles LINGO, YOUR AI ASSISTANT, EXPLAINS EVERY WORD • Tap a word or an idiom and see what it means in this exact sentence. "Make sure" is one phrase, not two words • Hear how a word really sounds and see how the sentence is built, with parts of speech in color • Ask Lingo about anything you didn't get, or type a phrase in your language and hear how it's said PRACTICE INSIDE EVERY VIDEO • Choose how to watch: just enjoy, test your understanding, train your ear, build lines or speak • Hide the translation and work out the meaning, or hide the text and catch every line by ear • Shadow each line out loud, and watch the words light up as you say them WORDS THAT STICK • Save words from subtitles, books or your chat with Lingo in one tap • Spaced repetition brings each word back right before you'd forget it • Every card keeps the sentence, and the movie moment, where you met the word • Your saved words on your Home Screen, a new one every hour • A few minutes a day keeps your streak going, and freezes cover the busy days PLAYLINGO PRO Unlimited watching and practice, chat with Lingo, and AI subtitles for any podcast and your own recordings. Cancel anytime in the App Store. WHAT PEOPLE SAY (App Store reviews) "For the first time, I actually enjoy learning English." "The only app I use to watch English videos. It's simple, and works great." "Love the dual subtitle function." 67 LANGUAGES English, Spanish, French, German, Italian, Portuguese, Japanese, Korean, Chinese, Arabic, Turkish, Russian and more, each with explanations in your language. Watch, listen and read what you love. The language follows. Contact: info@playlingo.app Terms of Use: https://playlingo.app/terms

About

Smart Dictionary

Features
Read full description

Vocab helps you learn words from the real world — menus, books, signs, and homework — by turning photos into a personal vocabulary list. HOW IT WORKS • Take a photo or pick an image from your gallery • Tap any word on the picture to look it up • See pronunciation (IPA when available), meaning in your chosen language, synonyms, and usage examples • Save words to Stored vocab and review them anytime BUILT FOR LANGUAGE LEARNERS • Dual language bar: original text language and your explanation language • Pinch to zoom and pan on photos for precise word selection • Text-to-speech to hear words aloud • Filters for favourites, learned, and not learned YOUR LIBRARY • Stored vocab tab keeps every word you save • Open a word for full detail: meaning, family forms, past tenses, and the source photo • Mark favourites and learned as you progress SETTINGS & LANGUAGES • UI available in many languages • Privacy policy and support from in-app settings VOCAB PRO (OPTIONAL) • Remove ads • Unlimited AI-powered explanations in context (when configured) • Support ongoing development Vocab processes photos on your device for word lookup. Optional cloud AI enrichment requires an internet connection. Ads may be shown for free users. Privacy Policy: https://www.power-ai.app/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Download Vocab and build vocabulary from what you read every day.

Screenshots

Language Reactor4 screens
Smart Dictionary3 screens

Verdict

The call

The clearest difference is in-app purchases: Smart Dictionary at none against Language Reactor's 6. Smart Dictionary also leads on iOS requirement (16.0 vs 18.0). Language Reactor's advantage is ads (none vs shown) and update cadence (every 8 days vs monthly). On price 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 6 in-app purchases, starting at $11.90 per month. Smart Dictionary asks for nothing beyond the download.

UpkeepUpdate frequency

Language Reactor ships an update every 8 days, Smart Dictionary monthly. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
Language Reactor versus Smart Dictionary: the parameters behind the verdict, then further details
ParameterLanguage ReactorSmart Dictionary
PriceFreeFree
Rating4.5 (873 ratings) — better—
Positive reviews82.5% of reviews—
Number of ratings873 — better—
Update frequencyEvery 8 days — betterMonthly
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.016.0 — better
Further details — not scored
Size117 MB71 MB
Age rating12+4+
DeveloperAlexey NenastyevVu Tuan Minh

In-app purchases

6 purchases

Language Reactor

Subscriptions6
  • PlayLingo Pro$11.901 Month
  • PlayLingo PRO$34.996 Months
  • PlayLingo Pro$74.991 Year
Show 3 more
  • PlayLingo Pro1 Year trial$74.991 Year
  • PlayLingo Pro3 Days trial$74.991 Year
  • PlayLingo Pro Family$119.991 Year
None

Smart Dictionary

No in-app purchases

Questions

Is Language Reactor free?
Language Reactor is free to download, with in-app purchases available.
Is Smart Dictionary free?
Smart Dictionary is free to download, with no in-app purchases.
Do Language Reactor or Smart Dictionary have ads?
Smart Dictionary shows ads; Language Reactor does not.
Which is updated more often, Language Reactor or Smart Dictionary?
Language Reactor ships an update every 8 days, and Smart Dictionary monthly. Most recently, Language Reactor was updated on November 8, 2026 and Smart Dictionary on October 31, 2026.

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