Computer-implemented method for providing visual feedback to a user of a rotary shaver, and an apparatus and computer program product implementing the same

A non-transitory computer readable medium storing computer readable code that, on execution by a suitable computer or processor of a rotary shaver, causes the computer or processor;

• receive movement measurements representing movement of the rotatory shaver during a shaving operation;
• determine a representation of a trajectory of movement of the rotary shaver during the shaving operation based on the received movement measurements;
• project the determined representation of the trajectory of movement onto a two-dimensional plane;
• generate a graphical user interface (GUI), wherein the GUI includes the projected representation and a graphical template comprising an annular target zone for a correct circular motion of the rotary shaver during the shaving operation;
• and
• display the generated GUI.

An apparatus for providing visual feedback to a user of a rotary shaver, the apparatus comprising:

• a display unit;
• a processing unit in communication with the display unit;
• and
• a non-transitory memory unit storing instructions that, when executed by the processing unit, cause the processing unit to:
• receive movement measurements representing movement of the rotary shaver during a shaving operation;
• process the received movement measurements to determine a representation of a trajectory of movement of the rotary shaver during the shaving operation;
• process the determined representation of the trajectory of movement to project the representation onto a two-dimensional plane;
• generate a graphical user interface, (GUI), the GUI including the projected representation and a graphical template comprising an annular target zone for a correct circular motion of the rotary shaver during the shaving operation;
• and
• display the generated GUI on the display unit.