Jack Dorsey Drops His Second New App in a Week
Jack Dorsey is shipping. On Sunday, the Twitter co-founder shared a link on X (formerly Twitter) to a new app called Sun Day, which he claims helps users track their vitamin D intake. It’s the second new app he’s debuted in a week, and it’s all thanks to the help of AI. Sun Day calculates how long users can safely soak up the sun before burning their skin using the UV index of the user’s location, cloud cover, sunrise and sunset times, skin tone, and even what kind of clothes they’re wearing. T