Grades Calculator is an Android application developed by JZB Labs. It falls under the category of Education & Reference, and it is completely free to use. The app is designed to help students calculate their grades in a simple and efficient way.

The app lets you enter up to 22 grades to calculate a single final mark. You can also use the "Calculate required grade" button to find out the grade you need to pass a subject. The "My Grades" section allows you to save your grades for future reference and editing, with no limit on saved subjects. You can even assign a tag to each individual grade to make recognition easier. The app features a minimalist yet efficient and serious aesthetic that is visually appealing.

Overall, Grades Calculator is a must-have tool for students who want to keep track of their grades and calculate their overall performance. With more features like visual themes and personalization options coming soon, this app is sure to become even more useful in the future.