Dictation Trainer is a web app for training English listening through sentence-by-sentence dictation. Play a sentence, type what you hear, and get instant word-by-word feedback that shows exactly which sounds you missed โ weak forms, linking, and reductions. A constantly growing library of studio-quality audio lessons โ organized into structured series such as a TOEIC listening course and a step-by-step sentence-building path โ already spans CEFR levels A1โB2 and is expanding toward complete A1โC2 coverage, with new lessons added every week. The app is especially beginner-friendly: short everyday sentences, calm pacing, and word-by-word feedback help early learners improve fast.
What sets it apart is the practice loop around the lessons. A mistakes notebook automatically collects every sentence you miss, and daily smart review keeps resurfacing them until you clear each one with a perfect, hint-free attempt. A lesson studio turns your own material into complete dictation lessons โ AI generates the audio and per-word IPA โ and they live in your personal library, free to practice forever and shareable with friends or students. Sentence translations are available in 11 languages and counting โ Korean, Japanese, Simplified Chinese, Spanish, French, German, Brazilian Portuguese, Vietnamese, Indonesian, Thai, and Arabic โ with the interface localized in English, Korean, and Chinese. Free to start โ preview lessons need no signup.
A startup from Mapu, South Korea.
Sentence-by-sentence dictation
Listen and type full sentences, checked word by word
Instant feedback
Missed and misspelled words highlighted, with answer, translation, and IPA
Mistakes notebook
Mistakes notebook
Lesson studio
Create lessons from your own material with AI audio and per-word IPA
CEFR-leveled lessons
A1โB2 series including a TOEIC listening course, new lessons weekly
Translations
Sentence translations in 11 languages
Most language apps test you with multiple choice; Dictation Trainer makes you type every word you hear, then shows a word-by-word diff of exactly what you missed. Around that core loop it adds a mistakes notebook with daily smart review, and an AI lesson studio that turns your own material into complete dictation lessons with studio-quality audio and per-word IPA.
English learners from beginner (A1) to upper-intermediate (B2) who understand written English better than spoken English โ including TOEIC test-takers and self-learners in Korea, Japan, and beyond. Teachers are a second audience: the lesson studio lets them build custom dictation lessons from their own material and share them with students.
General language apps cover a bit of everything; Dictation Trainer goes deep on one skill โ decoding real spoken English. If you can read English but sentences at full speed still blur together, dictation attacks exactly that gap: weak forms, linking, and reductions become visible and trainable. It is also honest freemium โ preview lessons need no signup, and lessons you create yourself are free to practice forever.
It started from a classic learner frustration: knowing every word in the transcript but failing to catch the sentence at full speed. Lucky Code Studio built a tool around the old-school dictation method โ modernized with instant word-level feedback, spaced review of mistakes, and AI-generated audio โ and launched it in July 2026. New lessons ship weekly.
A modern TypeScript stack: a React web app served from Cloudflare's edge network, with AI text-to-speech for studio-quality lesson audio and LLM-powered sentence translations in 11 languages.
Dictation Trainer appears to be a niche practice tool for improving listening and transcription skills through audio dictation exercises, making it a useful supplementary resource for language learners though not a comprehensive standalone learning solution.
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