The language you read
actually
sticks.
Read AI-generated articles, save the words you meet in context, and climb four skill ladders — Listening, Speaking, Writing, and Reading. FSRS handles your review schedule.
Speaking Task · L3 Speaking
Shadow the model sentence
Word
serendipity
/ˌser.ənˈdɪp.ɪ.ti/
FSRS
7.4d
stability
Three steps to fluency
AntiRusty runs on a simple loop: input builds memory, memory unlocks output.
Meet Words in Context
Read AI-generated articles or chat with the AI tutor. Save any word you meet — every exposure counts automatically, no manual "mark as known" button.
Review with FSRS
Spaced repetition schedules each word right before you are about to forget it. Stability grows with every correct review.
Unlock Skill Practice
Listening unlocks from your first exposure to a word, and Speaking and Writing unlock from your third. Four ladders, one memory engine.
Built for English and Chinese
Same memory engine, tuned to how each language is actually learned.
English
CEFR A1–C2
- AI-generated reading passages leveled to your CEFR stage
- Pronunciation scoring down to individual phonemes
- IELTS-style skill practice across Reading, Listening, Speaking, and Writing
Chinese
HSK 1–6
- Toned pinyin input with a dedicated tone keyboard
- Tone scoring that catches tone sandhi, not just the base tone
- Simplified characters, with drills for easily confused characters plus handwriting practice
5 Levels to Fluency
This is the Speaking ladder — one of four. Listening (N1–N5) and Writing (W1–W5) run in parallel, each one unlocking only once your memory is strong enough for active production.
Word encountered but not yet active.
MCQ: pick the right meaning.
Fill in the blank — choose or type the answer.
Shadow model sentences.
Shadow a model sentence, then adapt it and create your own, with a keyword prompt to guide you.
20 self-produced sentences. True fluency.
Designed to reach L5 in about 60 days of consistent practice.
More than one way to practice
Ten modes, one memory engine underneath.
Chat AI
Chat freely or by topic, with level-matched reply suggestions when you get stuck. Tap Analyze on any message for an instant level score and specific fixes.
Topic Studio
Structured speaking and writing prompts by topic, with suggested outlines and useful phrases — or build your own. AI scores your response and checks you stayed on topic.
Debate
Argue a position against an AI opponent that pushes back — it does not concede easily.
Life Simulator
Role-play an entire life story, making decisions and holding conversations in character.
IELTS
Full-length practice tests across all four sections, scored like the real exam. English only.
Micro-drills
Short, instantly-graded reps on the trouble spots that trip learners up — tones and blurred initials for Chinese, tricky endings and stress for English — always free.
Dictation & Shadowing
Type what you hear, then repeat it back to train listening and pronunciation together.
Error Bank
Every mistake from every graded session lands here, turned into targeted drills to fix it.
Learning Plan
A personalized path through the app, sequenced to your level and goals.
Diary
Write about your day and get it graded and corrected by AI.
Everything you need to get fluent
FSRS v5 Spaced Repetition
Next review is scheduled at the exact moment before you forget. Stability grows with each session.
Bilingual AI Reader
AI-generated articles leveled to your CEFR or HSK stage. Tap any word to see its meaning without leaving the page.
Pronunciation & Tone Scoring
Phoneme-level feedback for English, tone accuracy — including tone sandhi — for Chinese.
Four Skill Ladders
Listening, Speaking, Writing, and Reading unlock in step with your exposure to each word.
Error Bank
Every mistake from every graded session is collected automatically and turned into a drill that targets it.
Deep Progress Tracking
Track stability, exposure count, and skill-level badges for every word you learn.
2
Languages
English and Chinese
4
Skill ladders
Listening, Speaking, Writing, Reading
5
Levels per ladder
from recognition to free production
Available on
iOS & Android
Free to download. Start reading in English or Chinese right away — the skill ladders unlock as your vocabulary grows.
QR Code
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Google Play · App Store