All 4 exam skills covered
Complete preparation in one placeTrain reading, listening, writing and speaking with focused grammar support and realistic tasks for your exam level.
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Pass your German exam. Know exactly what to fix.
See your weak points, get AI feedback on every answer, and walk into your exam confident you've fixed what matters.
Prepare for TELC, Goethe, TestDaF, DSH and ÖSD
TELC levelsA1A2B1B2C1 and C2 coming soon
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Real learner certificates
5 supported exams
From practice to proofResults earned by CertiLang learners.
Learn smarter, not harder.
Understanding beats memorising. CertiLang doesn't just tell you what's wrong it shows you why and what to improve next.
Feedback that explains why
Not just right or wrongUnderstand the reason behind every correction. Turn each mistake into a lesson you can apply to your next answer.
Real exam formats
Practise the structure, timing and pressurePrepare with tasks modelled on TELC, Goethe, TestDaF, DSH and ÖSD so the real exam already feels familiar.
Smart progress tracking
Know what to practise nextSee your weak spots across every skill and follow clear recommendations that keep your preparation focused.
See the feedback
From one mistake to your next step.
A score tells you that something is wrong. CertiLang shows you what changed, why, and which exercise fixes it, so the same mistake doesn't cost you points on exam day.
- 1Write your own answer
- 2See exactly what was corrected
- 3Read why, in your language
- 4Practise the rule straight away
1Your answer
„Ich möchte wissen, wann beginnt der Kurs, inserted: beginnt.“
2Correction
„Ich möchte wissen, wann der Kurs beginnt.“
3Explanation
In an indirect question, the conjugated verb goes to the end of the sentence. Move „beginnt“ after „der Kurs“.
4Recommended next exercise
Illustrative example. Explanations are available in 30 languages.
How it works
From first assessment to exam day.
Know where you stand and what to practise next.
Take the Test
A short assessment maps your reading, listening, writing and speaking.
Get your weak-point map
See which question types cost you marks. Your plan targets those first.
Practise with real feedback
Every answer gets specific corrections, so each mistake becomes a lesson.
Simple pricing · One complete Premium experience
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- Core reading, listening and grammar practice
- Basic progress tracking
- Limited AI interactions
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Prepare with a complete exam plan.
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- Detailed writing feedback and speaking evaluation
- Full mock tests and scoring
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- Focused study plan and progress insights
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Before you decide.
Honest answers about what CertiLang does — and what it doesn't.
View all questionsWill this actually help me pass?
CertiLang focuses on what matters: we show you exactly where you're losing marks and help you fix those specific problems before exam day. Our AI gives feedback on every answer so you learn from each mistake.
I've tried other apps and still failed. How is this different?
Most apps teach vocabulary or grammar in isolation. CertiLang diagnoses your actual weak points, gives specific feedback on your writing and speaking, and builds your study plan around what's costing you marks not generic exercises.
What exactly is free?
The free plan includes core reading, listening and grammar practice, basic progress tracking and limited AI interactions. You don't need a credit card to create an account. Full mock tests with scoring, detailed writing feedback and speaking evaluation are part of Premium, from €9.90 per month.
How does AI feedback relate to official exam scoring?
AI feedback is a study aid built around the tasks and skills your exam tests. It shows you what to correct and why, so you can revise and practise again. It is not an official score: only your exam provider (such as telc or the Goethe-Institut) grades your real exam, and no feedback can guarantee a particular result.
I only have 4 weeks until my exam. Is that enough time?
Yes. CertiLang's diagnostic shows your weak points immediately, so you focus on what matters most. Many learners use the final weeks for intensive, targeted practice and enter the exam room confident.
What if it doesn't work for me?
You're covered by our 14-day money-back guarantee. Try Premium, use all the features, and if you're not seeing progress, get a full refund. No questions asked.
CertiLang journal
Read from our experts.
Clear, practical guidance for choosing a certificate and preparing for what exam day actually asks of you.
Browse all articles
Your next step
Your exam date is set. Are you?
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- Choose your exam
- Set your level
- Start your first task
Built around TELC, Goethe, TestDaF, DSH and ÖSD.
