For more than two decades, the iTheory Code 2023: Theory Test in English has been the most trusted app for driving theory tests in Switzerland.

With more than 25,000 questions and answers, this is one of the largest and most popular codebooks in the country.

It is available in English, German, French and Italian.

As the official learning material for the driving license exam in Switzerland, it contains the questions from the annual theory test.

In addition, it contains a large number of questions and answers that have been collected over the years and that are suitable for practicing with.

It is intended for anyone who wants to pass a driving theory test in Switzerland.

It is available on both mobile devices and desktop computers.