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Translate anything, both ways
Speak or type in either language and get an instant translation. Tap any word in the result to save it as a focus word.
The speaking-first language learning app Speaking makes
perfect.
The most important part of learning a language is speaking it. FluenSi lets you build your own repertoire of words to learn, helps you review them at the right time and prompts you to produce an original sentence in each review, closing the loop with sentence feedback so you can keep sharpening your linguistic sword!
Launching soon on iOS & Android. Links go live at release.
- ✓ No ads, ever
- ✓ Works offline for review
- ✓ 24-hour free trial
How it works
Four steps to fluency
1
Translate and save
Speak or type a word or phrase, get an instant translation, then tap to save it as a focus word.
2
Get the full picture
FluenSi instantly analyses it: meaning, part of speech, full conjugation table and real example sentences.
3
Review by speaking, not guessing
At the right moment, say a fresh sentence with the word, never the same one twice.
4
Get feedback that sharpens you
After each review, your sentences are graded, with suggested edits to improve them.
Why
The FluenSi learning journey vs. everyone else
Most language apps optimise for a streak, keeping you in a doom loop of plain memorisation. FluenSi instead focuses on whether or not you can produce these words in a sentence, a far more effective tool for making long-lasting progress on your language goals.
Finding a word
Translate whatever you’re actually trying to say or understand, right in the moment, in either direction, then tap it to save.
Follow a fixed course. The vocabulary you see next is picked by a curriculum, prescribing a one-size-fits-all approach that isn’t tailored to you.
Understanding it
The instant you save it, FluenSi generates the full picture: part of speech, register, a complete conjugation table, real example sentences.
A single translation, maybe a picture. No grammar, no nuance, no forms: you’re on your own to figure out how to actually use it.
Practising it
Reviews ask you to speak a real sentence using the word: production, not recognition.
Tap the matching picture. Multiple choice. Drag-and-drop. You recognise the right answer, but when prompted to use these words in real life you are stumped.
Getting better
Every review has to be a sentence you haven’t used before: reuse an old one and it’s marked wrong. Afterwards, every sentence you said is graded for naturalness, with a suggestion on how to improve.
The same fixed exercises repeat. Nothing ever checks or corrects the language you actually produce. Progress is a streak, not a measured skill.
Retaining it
Because FluenSi gets you to produce new speech, each review is more effective.
Because other apps work mostly off memorisation, the spaced repetition is more aggressive and cumbersome.
New to a language?
Not ready for sentences yet?
Every speaker starts somewhere. Beginner mode is a short on-ramp: quick recall quizzes (see a word, pick its meaning) while you build your first ~100 words. Then FluenSi suggests switching that language to speaking mode, where the real progress happens.
- 1 Beginner mode
Quick recall quizzes while you build your first ~100 words.
- 2 Speaking mode
Use every word in a sentence of your own, with feedback after each session.
Each language has its own mode, so you can be a beginner in Japanese while speaking Spanish. Switch any time; your words and progress carry over.
Everything in one focused app
Built for words worth remembering
No endless owl streaks or filler lessons. Just the words you choose, learned deeply and reviewed at the perfect moment.
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Save words for spaced review
Every word you save joins your SRS queue and resurfaces exactly when you are about to forget it. No deck-building required.
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Full analysis the moment you save
Saving a word instantly gets you its part of speech, register, full conjugation table and real example sentences: the context you need to actually use it.
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Review by speaking real sentences
Each review asks you to say a sentence using the word (switch to typing if you prefer), proof you can use it, not just recognise it.
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Beginner mode for new languages
Just starting out? Quiz yourself on each word's meaning until you have a base of around 100 words, then move on to speaking sentences.
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Never the same sentence twice
Reuse a sentence you have already said for a word and it is marked wrong, so every review pushes you to generate fresh, natural usage.
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Feedback that sharpens every session
At the end of a review, each sentence you wrote is graded for naturalness, with suggestions on how to improve.
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Manage every language in one place
Add as many of the 25 supported languages as you like, then swipe between them right on the home screen, each with its own word list and review queue.
25 languages
Learn in the language you love
Full conjugation and analysis support across 25 languages, with more on the way.
Simple pricing
Try everything free for 24 hours.
Your first day is unlimited, starting from your first translation. After that, pick the plan that fits: still a fraction of Duolingo Super or Babbel.
Basic
$1.99USD / month
Everything you need to build the habit, with daily limits.
- 15 new focus words a day
- 30 reviews and 100 translations a day
- Full word analysis and conjugation tables
- Feedback on every sentence you say
- Beginner quiz mode
Pro Monthly
$4.99USD / month
No limits, month to month.
- Unlimited new focus words
- Unlimited reviews and translations
- Full word analysis and conjugation tables
- Feedback on every sentence you say
- Beginner quiz mode
Best value
Pro Yearly
$49.99USD / year
About $4.17/mo, 2 months free vs monthly.
- Unlimited new focus words
- Unlimited reviews and translations
- Full word analysis and conjugation tables
- Feedback on every sentence you say
- Beginner quiz mode
All plans renew automatically. Cancel anytime in your App Store or Google Play settings. No ads on any plan.
FAQ
Questions, answered
What makes FluenSi different from Duolingo or Anki?
You choose the words. Translate anything, save what is worth learning, and get automatic analysis, conjugation tables and example sentences: no deck-building, no fixed course. Reviews then ask you to speak real sentences instead of picking an answer, so you prove you can actually use the word.
How do reviews actually work?
Each review asks you to produce a sentence using the word, by speaking, or typing if you switch modes in settings. Reuse a sentence you have already used for that word and it counts as a fail, so you are always pushed to say something new and natural.
I am brand new to a language. Where do I start?
Turn on Beginner mode for that language. Reviews become a quick quiz: pick the right meaning from up to four options. Once you have built a base of around 100 words, FluenSi suggests moving on to sentences, and you can switch at any time.
What is the sentence feedback?
At the end of a review session, every sentence you wrote is graded for how natural it sounds. For anything short of perfect, you get shown the smallest edit that would fix it, with a short reason. It is included in both Basic and Pro.
Which languages are supported?
25 languages: English, Italian, German, Spanish, Chinese, Japanese, Arabic, Hindi, Portuguese, Greek, Dutch, Norwegian, Swedish, Finnish, Danish, French, Russian, Indonesian, Vietnamese, Thai, Croatian, Ukrainian, Polish, Turkish and Korean, with full conjugation and analysis support for each, and more languages on the way. Add as many as you like and swipe between them.
Is there a free trial?
Yes. Your first 24 hours are unlimited, with every feature included, starting from your first translation. After that, choose Basic or Pro to keep learning. There are no ads on any plan.
How much does it cost?
Basic is $1.99 USD a month, with up to 15 new focus words, 30 reviews and 100 translations a day. Pro has no daily limits and is $4.99 USD a month, or $49.99 USD a year (about $4.17 a month, 2 months free compared with monthly). Every feature is in both plans. Subscriptions renew automatically and you can cancel anytime in your App Store or Google Play settings.
When is it launching?
FluenSi is coming to the App Store and Google Play soon. Check back here: the download links go live at release.