For each registered sentence, automatically analyzes IPA pronunciation, linking, weak forms, and reductions at the word level. Weak forms, C-V linking, flapping, elision, assimilation, coalescence (yod coalescence), dark L, unreleased stops -- 11 sound shift patterns are color-coded and visualized. Tap any pattern to see a detailed explanation of why you couldn't hear it. Adopts the "listen and notice" approach, which phonetics research has proven most effective for non-native learners.

Use the Chrome extension to right-click and capture any word or phrase you encounter on the web. Captures accumulate in your inbox and can be sent to AI registration with one click. Never let a new expression slip away.

Just enter a word or phrase and AI auto-generates meaning, IPA pronunciation, syllable breakdown, 6 example sentences (with sound shift annotations), etymology, synonyms, antonyms, collocations, and CEFR level. Works with any input language. Syntax patterns (e.g., It is ~ for A to do) can be registered with wildcards. Bulk registration is also supported -- import from text files or CSV at once.

Core image, etymology, nuance differences between synonyms, and 6 example sentences with interlinear pronunciation notation (per-word IPA + sound shifts + stress patterns). Popover explanations for each sound shift. TTS audio playback button included.

47+ IPA symbols categorized into vowels, diphthongs, and consonants. Click any symbol to watch a 3D animation video showing mouth and tongue positioning. Voiced/voiceless pair display, R-colored vowels (rhoticity), and pronunciation tips included.

The SM-2 algorithm schedules reviews at optimal timing based on the forgetting curve. Three stages of increasing depth: Meaning Recall (x0.7) -> Pronunciation (x0.85) -> Instant Composition (x1.0). "Auto Mode" fully follows the SM-2 schedule. "Type Mode" lets you focus on specific review types. Mastery is visualized across 6 levels from Lv0 to Lv5.

AI auto-generates translation challenges for each registered entry. Three difficulty levels (beginner, intermediate, advanced). AI evaluates your answer and provides feedback on areas for improvement. API usage is displayed in real time.

Displays syntax patterns, idioms, and phrasal verbs as cards. Shuffle to randomly select today's phrases. Track progress at a glance with mastery badges and spoken level. After conversation practice, log results with "Spoke without looking / Spoke while looking" buttons.

Enter what you want to say in your native language, and AI prioritizes your under-practiced vocabulary when crafting the English translation. Sentence-by-sentence breakdown, highlighting of used entries, suggestions for noteworthy unregistered expressions, and nuance comparisons of alternative phrasings. Voice input supported. Turn "I wish I had said that" into your next weapon.

Speak into your microphone and Web Speech API / Whisper AI will listen and evaluate your accuracy. One-tap pronunciation check during reviews. Voice input in your native language is also supported in AI Compose.

See your streak, today's new entries, completed reviews, and pending reviews at a glance. Cumulative entry trends, mastery distribution, monthly calendar heatmap, and API usage visualized with charts.

All registered vocabulary is converted into semantic vectors using AI (sentence-transformers) and placed in 3D space. Semantically similar words cluster together. Get a bird's-eye view of your arsenal and intuitively spot where the gaps are.