Vade MecumLexDjus is a free Android application developed by LexDjus under the Education & Reference category. The app is designed to help users acquire legal knowledge while using their smartphones for other activities. It works by automatically overlaying small sections of law on the lock screen every time the user unlocks their phone. The app features six categories and disciplines, including the Constitution, Penal Code, Civil Code, and more. Other features include a menu of learned laws, laws to review, audio playback, daily content sync, and comments from the LexDjus team and other users. The app also allows users to disable the overlay if they want to take a break from studying. With Vade MecumLexDjus, users can gain legal knowledge without sacrificing extra time.