Smart Vault Calculator OS11 is an Android app developed by Proviyon Proguard that allows you to hide your private photos, videos, contacts and all types of files like jpg, JPEG, PDF, xlsx, xls (excel), PPT, text, apk etc. This app is designed to keep all your personal and private data safe and secure.

One of the key features of Smart Vault Calculator OS11 is its ability to hide photos and videos from your system gallery. It also allows you to hide all types of files, including media files. In addition, you can hide or unhide phone book contacts, and change your PIN from the settings menu.

Overall, Smart Vault Calculator OS11 is a reliable and secure app that helps you keep your personal data safe. If you're looking for an app to protect your privacy, Smart Vault Calculator OS11 is definitely worth considering.