Escala de Notas is a free Android app developed by chalalo that helps students calculate their grades by adding partial notes and exam percentages. The latest version, Version 10, comes with multiple new features that make it even more useful.

One of the most significant new features is the ability to export and share scales to PDF, which is helpful for students who need to share their grades with teachers or parents. The app now also has an improved design, and it is now compatible with Android 7 and its new permission system.

Other new features include the ability to add a note of approval, zoom in on the scale, choose to see the scale in one or two columns, and support for low-resolution devices. The app also supports decimals and has the option to select the increase of the scale, select the number of columns in the generation of the scale of notes, save the application on the SD card, and select the size of the letter in the generation of the scale.

Overall, Escala de Notas is a comprehensive grading app that is easy to use and packed with features that make it useful for students of all levels. The app's modern design, compatibility with newer devices, and ability to export and share scales make it a valuable tool for anyone looking to keep track of their grades.