See instantly what's off
Red underline, one click. You see the correct version + an explanation in your native language (Turkish, English, Russian, Polish, Arabic and 25+ more).
LETTER CORRECTION
Write in German without it getting embarrassing.
Job application, flat enquiry, letter to the citizens' office, complaint. You type, the AI corrects instantly: grammar, style, politeness. With an explanation of why it's better this way.
Try it free in the app
What you learn with it
Understand levels of politeness
Informal vs. formal address, „ich" vs. „mein", informal vs. formal sign-off: all in one trainer.
Real letters, real scenarios
Job application, flat viewing, sick note, complaint: 30+ templates you really need.
Learn the patterns, not just the corrections
After 5 letters you spot the same mistakes yourself. The trainer makes you a better writer, not dependent on the AI.
How it works
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Choose your scenario
Job application? Flat enquiry? Sick note? 30+ templates with task context.
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Write your letter
Type in the editor. The AI flags problems in real time.
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Compare + learn
Click a flagged spot: see the explanation, accept the correction, learn the pattern.
From 17 years of language-school experience
„Writing is the skill our learners most often have to practise alone, yet are left without feedback. That's exactly why we built the letter trainer.“
Start today. At your own pace.
149.99 € one-time. 6 months of access, no subscription. Video course, platform, AI exercises and the Hueber book included.