A free program for Android, by ZeeTech Studio.
This is a free and secure app that can protect your phone from being stolen or if it falls into the wrong hands. It can also be used for other purposes, such as protecting a child's device or securing important files. It can also be used to protect a business' device, for example, a business mobile phone that is accessible by an outside party.
This app is based on the concept of a secure lock screen. A secure lock screen requires a password to unlock it, and, in the case of this app, the password is a voice command that you give to the app.