English that
actually
sticks.
Read AI-generated articles → words appear in context → a 5-level output ladder takes you from passive recognition to free speaking. Powered by FSRS spaced repetition.
Speaking Task · L3 Phát âm
Shadow the model sentence
Word
serendipity
/ˌser.ənˈdɪp.ɪ.ti/
FSRS
7.4d
stability
Three steps to fluency
AntiRusty builds a closed loop: input feeds memory, memory gates output.
Read in Context
Read AI-generated articles at your CEFR level. New words are highlighted — each exposure builds your recognition.
Review with FSRS
Spaced repetition schedules each word optimally. Stability grows with every correct review — never forget again.
Climb the Output Ladder
From MCQ recognition (L1) to free speaking (L5). The system gates you automatically based on FSRS stability.
5 Levels to Fluency
Each level is gated by FSRS stability — you advance only when your memory is strong enough to support active production.
Word encountered but not yet active.
MCQ: pick the right meaning.
Fill-blank with choice or typing.
Shadow model sentences.
Shadow → Modify → Create → Keyword bridge.
20 self-produced sentences. True fluency.
Designed to reach L5 in ~60 days of consistent practice.
Everything you need to speak
FSRS v5 Spaced Repetition
Next review scheduled at the exact moment before you forget. Stability grows with each session — science-backed memorisation.
AI Context Variants
DeepSeek generates 6 real-world contexts (email, chat, interview...) for every new word. Your brain learns patterns, not isolated words.
Built-in Speech Recognition
Tap the mic, speak, get instant feedback. STT evaluates your shadow, modify, and create exercises without leaving the app.
Graduated Output Ladder
The system automatically unlocks each level when FSRS stability and exposure count hit the threshold. No guessing.
Native-Context AI Reader
Read AI articles matched to your CEFR level and vocabulary gaps. Every highlighted word feeds directly into your review queue.
Deep Progress Tracking
Stability score, appearance count, output level badge, and leech detection — for every single word in your vocabulary.
50
Exposures to master a word
appearance count threshold
5
Output levels
recognition → free speaking
60
Days to fluency
at consistent practice pace
Available on
iOS & Android
Free to download. Start with reading and FSRS reviews immediately — output tasks unlock as your vocabulary grows.
QR Code
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