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BZF: Flugfunkprüfung
All official Bundesnetzagentur questions for the German BZF radiotelephony certificate – with explanations, a traffic-light system and timed exam sheets.
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A look inside the app
Your exam prep with BZF: Flugfunkprüfung
If you are training as a pilot in Germany and want to talk on the radio under visual flight rules, you need the BZF radiotelephony certificate – BZF I for English and German radio communication, or BZF II for German-only radio. Before you get near a microphone, there is a theory exam, and this app is built for exactly that: all official exam questions from the Bundesnetzagentur catalogue in multiple-choice format, just as they appear in the real exam.
One thing to know up front: the app itself is in German. Questions, answers and explanations follow the official German catalogue, so you should be comfortable reading German to study with it. Even the BZF I exam, which qualifies you for English radiotelephony, is administered on the basis of this German question catalogue.
The learning tools do the heavy lifting: a traffic-light system rates every question from your answer history, an explanation accompanies each question, and exam mode runs authentic exam sheets against a countdown set to the official exam time, graded by the official scheme. The app is ad-free, works 100% offline, and 50 questions are free to try before you unlock the rest.
Who is the app for?
This app is aimed at student and private pilots preparing for the BZF exam in Germany – whether you are going for BZF I to fly with English and German radiotelephony or BZF II for German-only radio traffic. If you are an international student at a German flight school, be aware that the study content is in German; solid German reading skills are required to use the app effectively.
The exam
The BZF (Beschränkt Gültiges Sprechfunkzeugnis) is the restricted radiotelephony certificate for VFR flying in Germany. The exam is administered by the German Federal Network Agency (Bundesnetzagentur) and consists of a written multiple-choice part drawn from the official catalogue plus a practical part with simulated radio communication. BZF I additionally covers English radiotelephony, while BZF II is valid for German-language radio only. This app prepares you for the written theory part.
Learning features at a glance
Official Bundesnetzagentur questions
All officially available BZF exam questions from the Bundesnetzagentur catalogue in multiple-choice format, with the officially correct answers – the same pool your exam sheets are drawn from.
German-language study content
Questions, answers and explanations are in German, matching the official German catalogue – ideal if you are training at a German flight school and sitting the exam in Germany.
Exam sheets with official time limit
Exam mode serves authentic exam sheets with a submission timer set to the official exam time and grading based on the official evaluation scheme – a realistic dress rehearsal.
Traffic-light learning system
A smart algorithm evaluates your answer history for every question: red means keep practising, green means exam-ready. Detailed statistics show your progress at any time.
An explanation for every question
Each question comes with a clear explanation of the underlying radiotelephony procedure, so you understand the material rather than memorising answer letters.
Offline, ad-free, 50 questions free
The app runs 100% without an internet connection and shows no ads. Try 50 questions for free, then unlock everything with a monthly, yearly or one-time payment.
Frequently asked questions
Is the app available in English?
No. The BZF app is German-language only – questions, answers and explanations follow the official German Bundesnetzagentur catalogue. There is no English version of the question content, so you need to be able to read German to study with it. This page simply provides English-language information about the app.
I want to fly with English radiotelephony – is this still the right app?
Yes, if you are taking the exam in Germany. The BZF I certificate is what qualifies you for English radio communication under VFR, and its theory exam is based on the official German question catalogue that this app contains. The app itself, however, presents that material in German.
BZF or AZF – which certificate do I need?
The BZF covers radiotelephony under visual flight rules: BZF II for German radio traffic, BZF I additionally for English. If you plan to fly under instrument flight rules (IFR), you need the AZF instead. For that we offer a separate app, AZF: Radiotelephony Exam, which has a full English landing page on this site with all details.
Where do I take the BZF exam?
With the German Federal Network Agency (Bundesnetzagentur). The exam combines written multiple-choice questions from the official catalogue with a practical exercise in simulated radio communication. The app trains you for the written theory portion.
How much does the BZF app cost?
Downloading is free, and 50 questions are included so you can test the learning system without commitment. To unlock the complete catalogue you pick whichever suits you: a monthly subscription, a yearly subscription or a single one-time purchase.
Can I study without an internet connection?
Absolutely – the app is fully usable offline and consumes no mobile data. Whether you are on the train to flight school or at an airfield with poor reception, all questions, explanations and exam sheets are stored on your device, with zero ads.
More apps: Aviation radio certificates (BZF & AZF)
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