Calculator Vault is an application that allows users to hide other apps on their mobile phones, ensuring privacy and security. The app disguises itself as a standard calculator, making it difficult for others to detect. It also provides a password protection feature, ensuring that only authorized users can access the hidden apps. Additionally, Calculator Vault offers a hidden picture function, allowing users to import and browse protected photos in a secure gallery.

To use Calculator Vault, users need to set a password upon first opening the app. Once the password is set, they can start hiding apps by selecting them from the phone's application list. The hidden apps can then be accessed either through the Calculator Vault interface or the main interface of the phone. Calculator Vault also allows users to hide notifications and provides different notification modes. Furthermore, it offers a gallery module to hide and protect secret photos and videos.

To hide photos or videos, users can use the Gallery Module in the app hider interface. They can create a folder with a specific name and select the desired pictures or personal photos to import into the private file. Similarly, to add an app to Calculator Vault, users can click the add app button in the hidden display interface and select the desired app from the phone's application list. To delete apps from Calculator Vault, users can long-press the hidden app and drag it to the delete icon.

It is important to note that if an app is uninstalled outside of Calculator Vault, the app's original data will not be copied to the same app within Calculator Vault. The Android AOSP Calculator source code used by Calculator Vault is licensed under the Apache License, Version 2.0.