Stop juggling multiple apps.
has everything in one place.
Transcription
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.
Transduction
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
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.
Marie marchait le long de la rivière quand elle vit un petit café...
Readspace
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
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.
Bonjour ! Comment allez-vous aujourd'hui ?
Je vais très bien, merci !
Streaming
Native video, radio and podcasts matched to your current level. Listen in the background while your radar quietly grows. Passive immersion that actually tracks.
TRACK YOUR DEPTH
Know exactly where you stand.
Three tools that turn invisible progress into something you can see, review, and share.
PLANS & PRICING
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.
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.
SUPPORT
Need help?
We typically respond within 24 hours.