A free app for Android, by Vault World.

A Calculator is a math-based utility that calculates the results of mathematical operations. It is used to solve algebraic and trigonometric equations, calculate percentages, and estimate the value of quantities. In most cases, a Calculator is used to calculate the values of mathematical constants, such as the pi, e, euler, and the gamma function.

If you’re wondering how to make your private files hidden on your phone, the answer is to use a Calculator, because a Calculator is the best tool to make your files inaccessible to other people. This tool is not only good at calculating values, but also can hide your private files, whether it’s videos, photos, or contacts.

Keep your photos and videos safe with Calculator Cloak. You can store your private photos and videos in this tool, and nobody will be able to view them except you.