The app is free to download, it does not require any personal information of the user, it is totally anonymous and secure. The application provides a quick identification of the stone in question and its characteristics.

It is important to understand that it is not possible to identify a stone just by its appearance, it is necessary to know its characteristics in order to know its nature and the effects that it can have on the human body.

The guide contains a list of all the stones that can be found in the Earth's crust, together with a description of their characteristics and the effects that they can have on the human body.

The user can add any stone or crystal, as long as it is in the list.