Calculator Lock App Hide Photo, Video is a free vault app for Android that can securely hide photos, videos, audios, and documents. It disguises itself as a calculator, ensuring that no one knows about the files stored in it. Using the MD5 encryption algorithm, it fully protects your data. You can lock all formats of files, including JPG, GIF, DOC, PDF, M4A, MP4, MP3, RAW, etc. Hidden files will no longer show up in gallery or other apps. This app also allows you to safely view hidden photos/videos with the built-in player & viewer.

The app lock feature prevents privacy from leaking to others. For apps that have been locked, people need to enter a password or draw the unlock pattern to use. If you forget your password, you can enter “=” to verify your security question and reset the password. Please note that Calculator Lock requires All Files Access permission to encrypt your private photos, videos, doc, etc. Rest assured that this permission will never be used for any other purpose. If you have any questions or concerns, you can contact the developer via email: