LogicInk is organized around the concept of temporary tattoo-like wearables that convey useful information about the wearer's body and environment, without the need of any electronics or additional gadgets. Powered by programmable chemistry and biology, these tattoo-like wearables seamlessly integrate into the user's daily life, enabling health awareness and self-expression. The first product in use is senses the extent of sunlght exposure enabling the user to avoid any unintentional overexposure to harmful UV rays. Other non-invasive programmable tattoo products in the works address address alcohol, hydration and pollution