What's the Best App for AZF & BZF Exam Prep? A Practical 2026 Guide
If you're getting ready for your AZF, AZF-E, BZF I, BZF II or BZF-E exam in Germany, you've probably noticed how dated the official preparation material feels. Static PDFs, the right answer always sitting in slot A, no way to know what you actually understand — most people end up looking for an app instead.
I've been there, and I ended up building one. But before recommending anything, let's talk about what actually makes a good AZF/BZF trainer. Then you can judge for yourself.
Seven criteria that separate a good AZF/BZF prep tool from a frustrating one, an honest look at your real options (PDFs, free apps, paid apps, books), and a transparent breakdown of where AZF/BZF Trainer fits in.
Seven things a good AZF/BZF trainer should have
Use this list as a checklist when you compare options. Skip anything that misses more than two of these — exam prep is short, and you don't have time to fight your tools.
Official Bundesnetzagentur questions
The BNetzA publishes the exact question catalogue used at the exam. Anything else is a guess. If your tool isn't built directly from the official catalogue, you're studying a copy of a copy. "Official" or "Bundesnetzagentur" should be front and centre.
Realistic exam simulation
The written parts are 100 questions in 60 minutes. Your tool should reproduce those exact conditions, with answers shuffled. Practising in unrealistic conditions builds the wrong reflexes.
100% offline
You won't have signal at every testing centre, and the best study moments are on the train, in a waiting room, or between flights. A tool that needs internet limits when and where you can train. Offline isn't a nice-to-have.
One-time purchase, not subscription
Exam prep takes weeks, not months. A subscription model is misaligned with your actual need. A reasonable one-off price under 10 € is fair and lets you train as long as you need without watching a clock.
Weak-spot tracking
The catalogue holds hundreds of questions. Reviewing them all over and over wastes time once you've nailed the easy ones. A good tool tracks the questions you keep getting wrong and prioritises them — this single feature can cut your study time in half.
Both iOS and Android
Sounds obvious, yet plenty of prep tools ship on one platform only. If you switch phones, share with a study partner, or just like keeping your options open, broad availability matters.
Covers every exam variant
AZF, AZF-E, BZF I, BZF II and BZF-E share a base, but each has its own catalogue and quirks. Bouncing between three apps for three exams is friction. Look for one tool that covers everything.
What's actually out there
An honest look at the options most candidates consider, with strengths and weaknesses:
Official BNetzA PDFs
Free and authoritative — genuinely useful as a reference. Downside: static text. No simulation, the right answer sits in the same position every time, no shuffling, no progress tracking, no way to focus on what you don't know. Great as a backup, exhausting as your main tool.
Free aviation apps and forums
Quality varies wildly. Some are genuinely useful, others rely on outdated questions or shaky update cycles. Watch out for ads (a distraction during practice), missing categories (no AZF-E for instance), and apps that haven't been updated in years — the catalogue does evolve.
Paid mobile apps
A handful of solid options exist (including ours). Use the seven criteria above as your checklist. Read reviews, but read them critically — a "doesn't work" review from 2022 may not reflect a 2026 update.
Aviation textbooks
Worth keeping for theory, especially around radiotelephony rules, ICAO phraseology and aviation regulations. Not a replacement for practising the actual exam questions, though.
How AZF/BZF Trainer maps to these criteria
I built AZF/BZF Trainer because I couldn't find a tool that ticked all the boxes when I was preparing my own BZF-E. Here's an honest read against the same checklist:
- Official Bundesnetzagentur questions — built directly from the published BNetzA catalogue.
- Realistic exam simulation — exact 100-question / 60-minute format with shuffled answers.
- 100% offline — every feature works without internet, including stats and progress.
- One-time purchase — €5.99 on iOS, €7.49 on Android (Germany), all future updates included, no subscription.
- Weak-spot tracking — questions you struggle with are prioritised automatically.
- Both iOS and Android — native apps on both stores.
- Covers every variant — AZF, AZF-E, BZF I, BZF II and BZF-E in one app.
Honest caveats
- The interface is in English, German or French. Exam questions appear in the language of the exam — German for BZF I/II/AZF, English for BZF-E/AZF-E.
- We don't simulate the oral / radiotelephony part of the exam. For that, LiveATC and YouTube ATC channels are the better tools — and they're free.
Final thoughts
There's no perfect tool, and the goal isn't to find one. The goal is to find one that matches how you actually study — short sessions on a phone, longer ones at a desk, or a mix.
Whatever you pick, the principle stays the same: practise the official questions, in real exam conditions, every day, in short sessions. The tool matters less than the consistency. Pick something that gets out of the way and lets you focus on the questions themselves.
Try AZF/BZF Trainer
Available on iOS and Android. One-time purchase, no subscription, fully offline.