Its purpose is to help people protect themselves from ultraviolet light. Excessive exposure to this radiation causes sunburn, eye damage, skin aging and skin cancer (more information in the questions section of the app).
World organizations recommend that people protect themselves, for example using sunscreen when the index is 3 or more.
The application tells you according to your skin type the maximum direct exposure time for the current ultraviolet light level.
Useful to prevent diseases and for people suffering from some types of conditions such as cancer, vitiligo, lupus, people with very light skin, albinos, diabetes among many others.

THE SUN IS NECESSARY BUT IT CAN ALSO BE VERY DANGEROUS, TAKE AWARENESS !!