Mi Cuaderno QR is an Android application developed by S.T.I.S. that offers quick and easy access to important information for high school and pre-university students. The app allows users to scan QR codes to access information related to their studies, including notes, practice exercises, and other useful resources.

The application's simple and intuitive interface makes it easy to use. With just a few clicks, students can access the information they need without having to navigate through multiple websites or folders. Additionally, Mi Cuaderno QR is free to use, making it an accessible resource for all students.

Overall, Mi Cuaderno QR is a useful tool for high school and pre-university students who need quick and easy access to important information related to their studies. Its simple interface and free access make it a great resource for students on the go.