This app was mentioned in 4 comments, with an average of 5.50 upvotes
If you're really bored, here's an Austrian (not German, but not too different) written/theory test practice app. In the top right there's an option to set the language to English. Questions are multiple choice, two-part, check all that apply, if you get the first part wrong you don't see the second part but still lose the marks.
Should also be available on iOS if you look for it
https://play.google.com/store/apps/details?id=com.austrianapps.oeamtc.fs
The driving test also may include technical questions about checking oil level, information on tyres, lights and when to use them (low beam/high beam, hazards), how to check if brakes are functional (handbrake test, brake booster, sealed brake hydraulics). During the test, you typically get tested on parking (parallel parking is guaranteed), obeying rules on yielding to other traffic and pedestrians, obeying speed limits and appropriate driving speed (including economic driving by using the correct gear and avoiding excessive gear changes), and lane changes.
You also need to complete a first aid course and 32 theory lessons as well as 10 car lessons. You do the test in a manual, if you do it in an automatic you get an Automatic-only license.
you can take a look at the standardized test with this app, its available in english: https://play.google.com/store/apps/details?id=com.austrianapps.oeamtc.fs
for a car license theoretical test, youll have to select the B license when first opening the app, and then do Grundwissen Basismodul and Zusatzmodul B in 'practice exam'
Da gabats die Führerschein-Test App vom ÖAMTC: https://play.google.com/store/apps/details?id=com.austrianapps.oeamtc.fs
Die Oeamtc App ist auch nicht schlecht. Android Oeamtc