Σήματα is a free Android app developed by AppDVision that serves as a theoretical exam for the Greek Driving Test. The app boasts a rich 45MB installation that contains over 2000 questions in four different languages, complete with images and Greek voice speech for each question. Along with the questions, there are textbooks available for every category, as well as reviewing and correction features.

One of the standout features of Σήματα is the Greek voice speech, which makes studying for the driving test more accessible to those who may struggle with reading or writing. The app also covers a wide range of topics, ensuring that users are well-prepared for their driving test. Overall, Σήματα is a comprehensive and useful tool for anyone studying for the Greek Driving Test.