A fun way to prepare for national exams in Physics. There are questions from various sources (past issues of Panhellenic exams, Study4Exams, OEFE, etc.) and by section.
Answering correctly earns you points, while answering incorrectly you lose one point. You can see the progress of your points as well as your ranking in relation to other children who use the application.

At the moment you can only log in to the application with a Google email (gmail).

Additional features added in each version:
v29) Material of school year 2022 - 2023!!!

v23) "Leaderboard" so you can see your ranking.

v21) 2020 - 2021 school year material! The app saves the "difficulty of the questions" and the "subject" the user wants to be tested on so they don't have to set them every time the app starts.

v17) The user can send one of the answered questions to a friend for them to answer (if they haven't answered it already).

v16) User can choose whether to start with "easy", "hard" or random questions.

v15) The user can see either all the questions he answered or only the questions he answered correctly or only those he answered incorrectly. So he doesn't have to look for his wrong answers in the whole list of questions.