A mobile apparatus is provided that is able to equip any object of value, such as a watch or piece of jewelry, and protect it. The present mobile apparatus includes: an electronic module able to execute a mobile application, a display screen connected to the electronic module and arranged to display information relative to the mobile application, and a fastening support whereof the shapes and dimensions are arranged so that the mobile apparatus can successively equip any object of value, and to be able to fasten, removably and by superposition, at least one display screen to an object of value when object of value is attached around part of a human body. In addition, the mobile apparatus covers at least part of a surface of the object of value designed to be easily visible by the person when the object is worn.