Usar la aplicación APKPure
Obtener Entrance Helper versión histórica en Android
Marca a los alumnos que han ingresado a la escuela, sin usar torniquetes
An application for students and teachers that allows students to generate a QR code, and teachers to record students who entered the school using the received code.
By the way, so that the names of students are displayed when in the water, you can import a database with QR codes in excel format into the application.
(card id, full name, class).