Interactive labs, quizzes and flashcards for the ATPL theory exams.
ATPL Lab is the Zephyr app for student pilots preparing the EASA ATPL theoretical subjects. Each lab takes a topic that is hard to picture on paper – the wind triangle, a VOR radial, an NDB track, a holding entry – and turns it into something you can fly, adjust and watch, and then test yourself on.
Free to download for Android phones and tablets, iPhone, iPad and Mac.
Coming soon on Google Play and the App Store.
010 Air Law
EASA: Air Law
Holding Lab
Direct, parallel and teardrop entries, timing and speed limits, on a racetrack you fly with the HSI.
022 Instrumentation
EASA: Aircraft General Knowledge – Instrumentation
Instruments Lab – coming soon
Pitot-static system, gyroscopic instruments, magnetism and compass errors.
032 Performance
EASA: Flight Performance and Planning – Performance
Performance Lab – coming soon
Take-off and landing distances, climb gradients and the factors that change them.
061 General Navigation
EASA: General Navigation
Wind Lab
Any wind triangle, true / magnetic / compass conversions, drift and components.
Globe Lab
Great circle and rhumb line on a globe you can turn and on a Mercator chart: convergency, conversion angle, vertex, departure.
062 Radio Navigation
EASA: Radio Navigation
VOR Lab
Radials, intercepts, TO/FROM logic, CDI and HSI, DME slant range.
ADF Lab
NDB with fixed card, rotatable card or RMI; homing, tracking, QDM/QDR, ADF errors.
HF Lab
Sky-wave propagation: critical frequency, MUF, LUF, FOT, skip distance, day and night.
Modulation Lab
AM, DSB, SSB, FM, PM and pulse modulation with spectra, bandwidths and emission designators.
Subject codes and titles follow the EASA ATPL(A) theoretical knowledge syllabus. Each lab covers one or more learning objectives of its subject; it does not replace the full subject.
A look inside
Four of the labs as they appear on a phone, in dark mode. The app also has a light theme and a two-column layout on iPad and Mac.
VOR Lab
062 Radio Navigation
Wind Lab
061 General Navigation
Holding Lab
010 Air Law
Globe Lab
061 General Navigation
On iPad and Mac the instrument stays on the left and the controls on the right.
How it works
Interactive lab. Move the controls and watch the instrument, the chart or the aircraft respond in real time.
Quiz. Multiple-choice questions generated from the lab itself, four options each. A “Show in the lab” button takes you back to the interactive view to see why an answer is right.
Flashcards. Flip cards for definitions and rules of thumb, with self-assessment so you can review only what you don’t know yet.
Free to try, pay once. The interactive part of every lab is free. Quizzes and flashcards are unlocked with a one-time purchase: a single lab, a whole subject, or everything in the app including future labs. No subscription, no account, no ads.
Works offline. Everything runs on your device and your progress stays there too. Purchases are handled by Google Play or the App Store and follow your store account, so you can restore them on a new device.
Where to get it
Google Play
Android phones and tablets
Android 7.0 or later.
Free download. The optional content is sold as in-app purchases, billed by Google Play to your Google account at the price shown in the store in your local currency.
Developer: Zephyr Aerospace (Zephyr S.r.l.).
Listing coming soon.
App Store
iPhone, iPad and Mac
iOS / iPadOS 15 or later; Mac with Apple silicon (the iPad version runs on macOS).
Free download. In-app purchases are billed by Apple to your Apple Account at the price shown in the store in your local currency.
Seller: Zephyr S.r.l.
Listing coming soon.
ATPL Lab is distributed only through Google Play and the App Store: there are no APK files or other installers to download from this site. Updates arrive automatically through the store, purchases are tied to your store account and can be restored on a new device, and refunds follow the policies of each store. The official store badges and links will appear here as soon as the app is live.
Questions
Do I need an account? No. The app collects no personal data at all – see the privacy policy below.
Can I use it on more than one device? Yes, on devices signed in with the same Google or Apple account: use “Restore purchases” in the app menu. Purchases do not transfer between Android and Apple.
Is ATPL Lab affiliated with EASA? No. ATPL Lab follows the EASA ATPL learning objectives but is an independent study aid and does not replace an approved training organisation.
Which language? The app is in English, the language of the exams.
Privacy & contact
ATPL Lab does not collect personal data. Read the Privacy Policy of the ATPL Lab app.
Questions, feedback or support: info@zephyraerospace.com