Which App Is Best for Learning German? Is Duolingo Really Enough?

The Short Answer

The best app depends on your goal. If you just want to pick up a few words or get by on holiday, a free app like Duolingo is a solid choice. If you want to live, work, or gain citizenship in Germany, or if you need to pass an official exam, you need more than a swipe-based app.

Duolingo gets you comfortably to around A1 or A2. After that it becomes difficult: the app cannot replace free speaking, writing formal letters, or precise exam preparation. For B1 and for official exams you need a structured course with a real teacher.

What Duolingo Does Well

Duolingo is popular because it is free, easy to use, and motivating. It gets a lot right:

• Daily practice. Short lessons and reminders help you show up every day. That matters, because consistency is everything in language learning.
• Vocabulary and grammar basics. You learn words and simple sentences in a playful way.
• Listening and reading. Studies show that learners at A2 level score well on independent tests for reading and listening.

Duolingo has also expanded its content and now offers material up to B2 for some languages. The core problem remains, though: an app cannot talk to you the way a human can.

Where Duolingo Falls Short

Language is more than clicking and choosing the right answer. That is exactly where Duolingo hits its limits:

1. Free speaking. In an app you type or tap. In real life — and in every exam — you have to speak freely, respond to questions, and hold a conversation. Duolingo barely practises this.
2. Writing. Writing a letter, an email, or a complaint is part of every B1 exam. An app does not correct a freely written text with real feedback.
3. Exam format. DTZ, telc, and Goethe have fixed tasks and scoring rules. People who are unfamiliar with the format often fail even though their German is actually good enough.
4. Explanations when you make mistakes. An app tells you something is wrong. It does not patiently explain why or how to get it right next time.

Is Duolingo Enough for Citizenship?

No. For citizenship you generally need German at B1 level. The usual proof is the Deutsch-Test fur Zuwanderer (DTZ). One important point: the DTZ is one exam with two possible outcomes (A2 or B1), depending on how well you do. For citizenship, the B1 result is what counts.

The DTZ tests all four skills: listening, reading, writing, and speaking. Those are exactly the four skills you cannot train sufficiently with an app alone, especially speaking and writing. That is why Duolingo is not enough for this goal.

What the Exams Actually Require

So you can assess your goal accurately, here is a brief overview of the main B1 exams:

Goethe-Zertifikat B1

The exam consists of four modules: reading, listening, writing, and speaking. You can take the modules separately. If you fail only one module, you retake only that module in the same year, not the whole exam. The pass mark is 60 out of 100 points (60 percent) per module.

telc Deutsch B1

Here too, a written and an oral section both count. You need to score roughly 60 out of 120 points (50 percent) overall and pass at least one section. From B1 onward, individual sections can be retaken with telc.

DTZ

The DTZ is the typical exam at the end of an integration course. The written part takes around 100 minutes, the oral part around 16 minutes.

For all three exams the same rule applies: speaking and writing both contribute to whether you pass. That is exactly why you need targeted training and real feedback.

How to Do It Right (in 4 Steps)

1. Start easy. Use an app like Duolingo for your first vocabulary and a daily routine. That never hurts.
2. Switch to structure in time. From A2 at the latest, when you are heading toward B1, you need a clear learning path and a teacher.
3. Practise real speaking and writing. Find a course where you hold dialogues, write letters, and receive feedback.
4. Prepare for the exam format. Get to know the exact tasks of DTZ, telc, or Goethe before you register.

The Honest Recommendation

Apps are a good start, but they are not a substitute for a proper course. The best solution combines both: playful practice and a real teacher who corrects you and prepares you for the exam.

That is exactly what the V-IZ online German course offers: a video course with the accredited German-as-a-foreign-language teacher Marlene Fries, the Hueber textbook “Schritte plus Neu” included, and an AI trainer that helps you specifically with speaking, pronunciation, and writing letters. So you practise flexibly like with an app, but with the quality of a real language school.

If you want to complete A1, A2, and B1 one after another, the Complete Package A1 to B1 is the simplest path, because it accompanies you from the very beginning through to the B1 exam and prepares you for telc, Goethe, and DTZ.

Summary

Duolingo is a good app for getting started and staying consistent, and it gets you to roughly A1 or A2. For B1, for speaking freely, and for exams like DTZ, telc, or Goethe, it is not enough on its own. Combine the app with a structured course and real feedback, and you will genuinely reach your goal.