Prepare for Germany's BZF radiotelephony certificate with all official Bundesnetzagentur questions, timed exam sheets and offline mode. App is in German.
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AZF Aircraft Radio Certificate
The official exam questions
All 289 official AZF exam questions with explanations, a smart traffic-light system and exam simulation under the official time limit – offline and ad-free.
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A look inside the app
Your exam prep with AZF Aircraft Radio Certificate
If you want to fly under instrument flight rules, you need the AZF radiotelephony certificate – and that starts with passing the theory exam. This app contains the 289 official exam questions from the Bundesnetzagentur catalogue in multiple-choice format, exactly as you will see them in the exam. Every question comes with an explanation, so you genuinely understand aviation radio procedures instead of just memorising answers.
The traffic-light system in learning mode takes the planning off your hands: a smart algorithm rates how confident you are with each question based on your previous answers. Red means keep practising, green means you are ready – and detailed statistics show you exactly where you stand.
When it is time for the final check, exam mode simulates the real thing: exam sheets inspired by the official layout, a submission timer set to the official exam time and grading based on the official evaluation scheme. The app is ad-free, works 100% offline and lets you start with 50 questions for free – after that you unlock everything with a monthly, yearly or one-time payment.
Who is the app for?
This app is for pilots who want to obtain the AZF certificate for radiotelephony under instrument flight rules – typically as part of IFR training or on the way to a professional pilot licence. It is equally useful for international students training at a German flight school, since the AZF is examined in Germany, and for holders of a BZF certificate stepping up to IFR flying.
The exam
The AZF exam is taken with the German Federal Network Agency (Bundesnetzagentur) and is required for radiotelephony under instrument flight rules (IFR), which makes it relevant for many pilots training in Germany, including international students. The theory part consists of multiple-choice questions from the official catalogue; a practical part simulates IFR radio communication in English. This app prepares you for the theory part.
Learning features at a glance
All official questions
The app contains the 289 official AZF exam questions from the Bundesnetzagentur catalogue with the officially correct answers – in multiple-choice format, just like the real exam.
Clear explanations
Every question comes with an explanation covering the background of IFR radiotelephony – so the knowledge sticks well beyond exam day.
Timed exam sheets
Train under realistic conditions with exam sheets inspired by the official layout, a countdown timer set to the official exam time and grading based on the official evaluation scheme.
Smart traffic-light system
Learning mode rates every question based on your answers – red means more practice, green means you are ready. Detailed statistics track your progress.
Offline and ad-free
No reception, no Wi-Fi? No problem: the app works 100% without an internet connection and is completely free of ads.
50 questions free
Download the app for free, try 50 questions and then unlock the full catalogue – with a monthly, yearly or one-time payment, whichever suits you.
Frequently asked questions
Do I need the AZF or is the BZF enough?
It depends on how you fly: for radiotelephony under instrument flight rules (IFR) you need the AZF, while the BZF I or BZF II is sufficient for VFR flying. If you only fly VFR, our sister app for the German BZF certificate covers the matching official questions – it now has an English info page on this site too, though the BZF app itself remains German-language.
Are the questions in the app the official exam questions?
Yes, you study with the 289 official AZF exam questions from the Bundesnetzagentur catalogue, including the officially correct answers in multiple-choice format. Your actual exam sheets are drawn from exactly this pool.
Where do I take the AZF exam?
The AZF exam is administered by the German Federal Network Agency (Bundesnetzagentur). Alongside the written multiple-choice part, there is a practical radiotelephony exercise under instrument flight rules in English – the app prepares you for the theory part.
Is the AZF app free?
You can download the app for free and start with 50 questions. To unlock the full question catalogue, you choose between a monthly subscription, a yearly subscription or a one-time payment – whatever fits your study plan.
Is there an exam simulation with a time limit?
Yes. In exam mode you work through authentic exam sheets with a built-in submission timer set to the official exam time. Grading follows the official evaluation scheme, so you get a realistic sense of whether you would pass.
Does the app work offline?
Yes, it runs 100% without an internet connection and without using any data. You can keep studying on the train, at the airfield or anywhere without reception – and there are no ads.
More apps: Aviation radio certificates (BZF & AZF)
Start your preparation now
Download AZF Aircraft Radio Certificate for free and study with the official exam questions — anytime, even offline.