Comparison

KeyFluent vs Alex

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

Head to head
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

About

Alex

Learn languages by integrating vocabulary discovery directly into your iPhone keyboard. Engage in short, fun games and review sessions based on the words you encounter daily. Track your progress with points, badges, and a vocabulary map.

Highlights
  • iPhone keyboard integration
  • Vocabulary discovery from daily typing
  • Short language games
  • Flashcard and multiple-choice reviews
  • Progress tracking and leaderboards
  • Vocabulary map
Read full description

Learn from the words in your life. Play to make them stick. Alex combines a language-learning app with an iPhone keyboard. Write your everyday messages, discover useful vocabulary, then return to the app for short lessons and reviews built around your words. New: Alex now has lessons made by AI, written from what you type with the keyboard. YOUR KEYBOARD IS THE STARTING POINT Type in French or English. Alex spots useful words in your sentences and helps you learn a new language. Your vocabulary grows from the language you actually use. The Alex Mirror line above the keys translates your sentence while you type: tap the translation to put it straight into your message. SHORT LESSONS, REAL PRACTICE Match words, build sentences, reply to Alex and write in your own words. Stuck? Ask Alex. Every word you tap is read aloud. Review your vocabulary with flashcards and multiple-choice questions. SEE YOUR PROGRESS Finish a lesson to open a booster and stick its cards in your album. Earn coins to dress Alex up, travel from world to world and keep your streak alive. AN ACCOUNT THAT GOES WITH YOU Sign in with Apple if you like: your progress and your subscription follow you to a new iPhone. YOU STAY IN CONTROL Ordinary typing and corrections work on your iPhone, and passwords and secure fields are never read. The sentences you finish with Alex’s keyboard are kept for your lessons, and the newest are sent to our server and our AI providers to write them. They are never sold or used for advertising. With Premium, the Mirror line translates online unless you choose On iPhone. Optional usage analytics exclude your typed texts. Everything is explained in Settings › My privacy. The keyboard requires Allow Full Access to save progress in Alex. Lessons, online translation and account backup require an Internet connection. You can delete your online account in Settings › My account. ACCESS The keyboard and your first lesson are free; Alex Premium opens the next lessons. Monthly and yearly subscriptions are available. Prices and any eligible free trial are shown before purchase. Subscriptions renew automatically unless cancelled in your Apple account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

KeyFluent4 screens
Alex4 screens

Verdict

The call

The clearest difference is update cadence: Alex at every 2 days against KeyFluent's every 5 days. KeyFluent's advantage is iOS requirement (17.0 vs 26.0). On price, rating, review sentiment and ratings volume 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 and Alex sells 2 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for KeyFluent against 5.0 for Alex. Both are backed by a comparable volume of ratings — 5 and 5 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

KeyFluent ships an update every 5 days, Alex every 2 days. The most recent releases landed on October 15, 2026 and October 29, 2026 respectively.

Scorecard2 real differences · 8 level
KeyFluent versus Alex: the parameters behind the verdict, then further details
ParameterKeyFluentAlex
PriceFreeFree
Rating5.0 (5 ratings)5.0 (5 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings55
Update frequencyEvery 5 daysEvery 2 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad — betteriPhone
Requires iOS17.0 — better26.0
Further details — not scored
Size96 MB314 MB
Age rating4+4+
DeveloperStephen AlexanderRoudot Timothe

Customer experience

KeyFluent

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

Alex

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

KeyFluent

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

Alex

Subscriptions2
  • Espiga Monthly$6.991 Month
  • Espiga Annual7 Days trial$46.991 Year

Questions

Is KeyFluent free?
KeyFluent is free to download, with in-app purchases available.
Is Alex free?
Alex is free to download, with in-app purchases available.
Which has better reviews, KeyFluent or Alex?
KeyFluent and Alex are both rated 5.0 out of 5 on the App Store, from 5 and 5 ratings respectively.
Do KeyFluent or Alex have ads?
Neither KeyFluent nor Alex shows ads.
Which is updated more often, KeyFluent or Alex?
KeyFluent ships an update every 5 days, and Alex every 2 days. Most recently, KeyFluent was updated on October 15, 2026 and Alex on October 29, 2026.

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