Comparison

Learn vocabulary vs KeyFluent

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

Head to head
About

Learn vocabulary

Master essential vocabulary through speech-based learning. This minimalist app focuses on the most frequent words in a language, offering smart repetition and progress tracking. It works entirely offline and adapts to your learning goals.

Highlights
  • Learn by speaking
  • Focus on most useful words
  • Placement test
  • Spaced repetition
  • Progress tracking
  • Offline functionality
  • Dark mode design
Read full description

#5000words - Use Your Voice To Learn The Most Useful Vocabulary Master the most useful words in a new language. This app focuses on what really matters: learning vocabulary efficiently through speech. → WHY #5000words? • Learn by speaking, not by endless card swiping • Focus on the most useful words first • Created by a language enthusiast who actually uses it • Pure dark mode minimalist design • Works 100% offline → SMART LEARNING • Start with a placement test to skip what you already know • Master new words through intelligent spaced repetition • Get progressive hints when stuck (letter by letter reveal) • Track your progress: To Learn, Learning, and Learned • Understand 50% of a language with just 500 words → FLEXIBLE LEARNING • Choose your daily commitment level • Learn at your own pace • Perfect for busy professionals • No internet required • No ads, no distractions → AVAILABLE LANGUAGES • English (US) • Spanish (Spain) • More languages coming soon: Italian, French, German, Dutch, Russian, Portuguese, and Catalan Whether you're aiming to gain a basic understanding of your target language quickly or master the 5000 most useful words within a year, this app adapts to your goals. Built by a polyglot, for language learners who value efficiency and simplicity. Download now and start speaking, not swiping. [Photo credits: Freepik]

About

KeyFluent

Learn a new language effortlessly by integrating language learning directly into your daily messaging. This keyboard translates your typed messages in real-time and incoming messages, offering an immersive, low-pressure way to acquire vocabulary and phrases.

Highlights
  • Translate messages as you type
  • Automatic translation of incoming messages
  • Translate copied text
  • Hear word pronunciations
  • Save words to a personal deck
  • Vocabulary practice games
  • Adaptive keyboard layout
Features
Read full description

The average person sends close to 100 messages a day. KeyFluent turns every one of them into a chance to learn a new language. No lessons, no streaks, no extra time carved out of your day. Just type the way you always do, and watch a new language come to life right above your keyboard. TRANSLATE AS YOU TYPE Your message is translated above the keys as you write it, in over 130 languages, from Spanish and French to Japanese, Mandarin, and Hindi. Send it in the new language with one tap, and pick up the words just by seeing them every day. READ AND REPLY IN THEIR LANGUAGE Copy a message you can't read and switch to KeyFluent. The translation is waiting above the keys. Your reply goes out in their language automatically, then the keyboard switches back to your usual language when you're done. TALK FACE TO FACE The new Conversation screen turns your phone into a translator between two people. Each of you speaks, and the other hears and reads it in their own language. Scroll back through the chat anytime and save any line as a flashcard. HEAR EVERY WORD • Play the full translation in natural Google voices • Touch and hold any word to hear it, or slide across a phrase • Slow the pace down to catch every syllable FROM TYPING TO LEARNING Double-tap any translated word to save it, then open the Learning Center when you have a spare minute. • Flashcards for the words you've collected • A Mastery Game that makes practice feel like play • 15 vocabulary packs on themes like Travel, Food, Family, and everyday verbs AUTOCORRECT THAT KEEPS UP • Fixes typos using the words around it, even after you've moved on • Learns how you type, and gets more accurate the more you use it • Splits words that ran together and fixes fast-typing slips • Autocorrect in 17 languages, and it notices which one you're typing • One backspace after a correction brings back exactly what you typed MAKE IT YOURS • 24 themes, plus your own colors for the translation bubble • QWERTY, AZERTY, and QWERTZ layouts • Text shortcuts: type omw and get "on my way," or make your own • A Tap Map that learns where your fingers land and shifts the keys to match YOUR PRIVACY Your typing stays on your device. Autocorrect, predictions, your personal dictionary, and your Tap Map are built and stored on your phone. KeyFluent never logs or sells your keystrokes. Only the text you translate or play is sent to translation and voice services, and it's never used for advertising or tracking. Full Access lets the keyboard reach those services and use haptics. Details are in our Privacy Policy. SUBSCRIPTION Typing and autocorrect are free for everyone. Everything else is free for 7 days, then $3.99 a month, or $39.99 a year with the annual plan. • Payment is charged to your Apple ID when you confirm the purchase. • Your subscription renews automatically unless auto renew is turned off at least 24 hours before the period ends. • Your account is charged within 24 hours before the period ends. • If you start a paid subscription, any unused part of the trial is forfeited. • Manage or cancel anytime in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://sites.google.com/view/keyfluent/home

Screenshots

Learn vocabulary4 screens
KeyFluent4 screens

Verdict

The call

The clearest difference is rating: KeyFluent at 5.0 against Learn vocabulary's 4.5. Learn vocabulary's advantage is in-app purchases (none vs 2). On price, review sentiment, ratings volume and update cadence 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. KeyFluent sells 2 in-app purchases, starting at $3.99 per month. Learn vocabulary asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

KeyFluent holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 6 and 5 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 5 days. The most recent releases landed on October 27, 2026 and October 15, 2026 respectively.

Scorecard3 real differences · 7 level
Learn vocabulary versus KeyFluent: the parameters behind the verdict, then further details
ParameterLearn vocabularyKeyFluent
PriceFreeFree
Rating4.5 (6 ratings)5.0 (5 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings6 — better5
Update frequencyEvery 5 daysEvery 5 days
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhoneiPhone, iPad — better
Requires iOS18.017.0 — better
Further details — not scored
Size301 MB96 MB
Age rating4+4+
DeveloperAlvaro Jose Jimenez PalenzuelaStephen Alexander

Customer experience

Learn vocabulary

All ratings4 ratings
Positive75.0%
Neutral25.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

KeyFluent

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Learn vocabulary

No in-app purchases

2 purchases

KeyFluent

Subscriptions2
  • KeyFluent7 Days trial$3.991 Month
  • Annual7 Days trial$39.991 Year

Questions

Is Learn vocabulary free?
Learn vocabulary is free to download, with no in-app purchases.
Is KeyFluent free?
KeyFluent is free to download, with in-app purchases available.
Which has better reviews, Learn vocabulary or KeyFluent?
KeyFluent is rated higher. Learn vocabulary averages 4.5 out of 5 from 6 ratings, while KeyFluent averages 5.0 from 5 ratings.
Do Learn vocabulary or KeyFluent have ads?
Neither Learn vocabulary nor KeyFluent shows ads.
Which is updated more often, Learn vocabulary or KeyFluent?
Learn vocabulary ships an update every 5 days, and KeyFluent every 5 days. Most recently, Learn vocabulary was updated on October 27, 2026 and KeyFluent on October 15, 2026.

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