Language learningthat goes beneath the surface

Languages offered

English
Hindi
Spanish
Arabic
French
Russian
Portuguese
German
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Italian
Polish
Dutch
Hebrew
English
Hindi
Spanish
Arabic
French
Russian
Portuguese
German
Korean
Italian
Polish
Dutch
Hebrew

Stop juggling multiple apps.

Fluenseahas everything in one place.

Transcription

ListeningWritingVocabularyGrammar

Audio plays. You type exactly what you hear, word for word. Accuracy is tracked in real time with instant corrections and replay. The best way to wire your ear to your hand.

0:12
Je suis all
Jesuisallé
EN“The train arrives at three”
FRYour answer...

Transduction

WritingGrammarVocabularyReading

An English sentence appears. You produce the full target-language equivalent from memory. Grammar, word order, and accuracy are all scored. The fastest way to build productive output.

Flashcards

VocabularyReading

FSRS-powered spaced repetition schedules every card at the exact moment you're about to forget it. Cards come from your personal corpus — every word you've encountered in Readspace or sessions.

le marché
AgainHardGoodEasy
23 cards due · FSRS scheduled
Chapter 2

Marie marchait le long de la rivière quand elle vit un petit café...

Readspace

ReadingListeningVocabularyGrammar

Graded stories and dialogues built around your known vocabulary — always targeting 95% comprehensible input. Word-level annotation, audio narration, and one-tap flashcard saving.

AI Conversation

SpeakingListeningGrammarVocabulary

Real-time voice or text conversation with an AI partner that adapts its vocabulary and complexity to your level. Corrections surface naturally in context. No judgment, infinite patience.

AI

Bonjour ! Comment allez-vous aujourd'hui ?

Je vais très bien, merci !

You
VideoRadioPodcast
Radio : Histoires Françaises

Streaming

ListeningVocabulary

Native video, radio and podcasts matched to your current level. Listen in the background while your radar quietly grows. Passive immersion that actually tracks.

Know exactly where you stand.

Three tools that turn invisible progress into something you can see, review, and share.

Language Radar

Six-axis radar — Vocabulary, Grammar, Listening, Reading, Writing, Speaking. Fills in real time after every session. The Daily Dive is weighted toward your weakest axis automatically.

VOCAB72READING78WRITING55LISTEN62GRAMMAR38SPEAK41

Example radar · fills as you practice

Expedition Log

Every session is logged — activities completed, words encountered, time spent, radar delta. Review your full history and spot patterns in what you practice and what you skip.

✎

Transduction completed — 91% accuracy

+45 XP2h ago
◆

32 vocabulary nodes acquired — Food & cooking

+64 XP5h ago
◗

Listening passage decoded at 78% comprehension

+28 XPYesterday
▤

Free reading — 22 minutes submerged

+33 XP2d ago

Example log · your entries appear here after each session

Community

A place to practise with real people. Post writing or recordings for peer review, read and write Dive Logs, join threads in the Dispatch, or message other learners directly.

Peer ReviewSubmit writing or recordings for community feedback
Dive LogsWrite and share blog posts about your language journey
DispatchThreads and discussion boards
Direct MessagesConnect one-on-one with other learners

Show up consistently. Pay less.

Every plan tracks six dimensions of fluency. Submariner subscribers turn weekly goals into bonus conversation time and money off their bill — the more you show up, the more you get back.

THE SUBMARINER REWARD

Hit your goals every week. Double your talk time and pay less.

Fluensea doesn't reward streaks with badges. Every week you hit all 6 goals, you spin for up to 2 extra hours of AI conversation — as much as 8 hours a month, on top of the 8 hours Submariner already includes. Do it 4 weeks running and next month is 25% off.

4 of 4 weeks→ 25% off
every qualifying week→ spin, up to 2 h

On annual billing, the discount runs every 4-week cycle all year — each perfect one banks its own slice of 25%, averaged across the year. The weekly spin runs either way.

This week's goals

Mon – Sun
Reading
95/150 XP
Writing
78/100 XP
Listening
44/80 XP
Speaking
18/120 XP
Vocabulary
160/200 XP
Grammar
55/60 XP
2 consecutive weeks

2 spins earned → 2 weeks to 25% off

Goal rewards apply to Submariner plan · All 6 weekly goals must be met · One spin per qualifying week, playable the following week · Bonus minutes expire at the end of that week · Annual plans prorate the same discount across every cycle in the year · Discount applied to your next billing cycle

Fluency is built through depth.
Start your descent.

Not through completing a curriculum — but through gradually becoming someone who lives in the language.

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