The patch works with a smartphone application; the wearer simply scans the patch with his or her phone. Thanks to a specific algorithm, the application uses graphs and statistics to provide advice on or for optimal sun protection.
It takes skin colour into consideration and offers personalised recommendations. The application alerts the user when UV protection becomes insufficient. The My UV Patch was launched in 2016 by La Roche-Posay, a brand that has proven its commitment to helping consumers protect their skin from the sun.