Twitter co-founder Jack Dorsey has released a new app that tracks sun exposure and vitamin D levels. This is his second app in a week, after the encrypted messaging app Bitchat, which he released last weekend.
Sun Day is already available for iOS via TestFlight, and the project code is available on GitHub. The app uses location data to display the local UV index and sunshine duration. You can detail your skin type and clothing level, then manually toggle your time in and out of the sun, and the app will track your estimated vitamin D levels throughout the day, as well as how long you can stay in direct sunlight without burning.
Dorsey says he’s “learning” through his recent weekend coding projects, which he’s developing with the open-source AI coding tool Goose. It and similar vibrational coding tools are one of the next key battlegrounds for AI tech giants – just last week, a $3 billion deal for OpenAI to buy AI coding tool Windsurf fell through as Google decided to hire Windsurf’s CEO and top talent to its DeepMind team.
