Μαθηματικά - Πανελλήνιες 2020 is a free Android app developed by Basil helmets, a professor of Mathematics at Kesari Schools. The app is an excellent resource for students preparing for C. Mathematics Lyceum exams. It is an interactive learning app that consists of true/false and multiple-choice questions. Every time the app is launched, it presents 12 randomly selected questions from a vast bank of issues. The app aims to help students revise and practice comprehensively and effectively.

One fantastic feature of the app is that every time a student answers a question incorrectly, the correct answer appears immediately with a full explanation. The app is designed based on the Crowder theory, which states that "mistakes are an essential element in the learning process." The app's educational value is enhanced by the fact that all shapes appearing within the app are designed using GeoGebra software.