This New App Wants to Help You Track Your Sun Exposure
The founder of Twitter, Jack Dorsey, has a bright idea that he's released as a beta app for iPhones: Sun Day, for tracking your exposure to the sun. The app is free to testers and so far contains basic information such as sunrise, sunset and the UV index in order to assess a user's potential burn-limit time and, as the app description says, "track your Vitamin D from the sun." Dorsey is currently testing UI updates and a solar noon notification, according to the app notes. In the app, users can