Twitter co-founder Jack Dorsey is on an app-building spree. After releasing a Bluetooth-based messaging app known as Bitchat earlier this month, this weekend Dorsey revealed one other app known as Solar Day that ostensibly helps customers monitor UV publicity and Vitamin D consumption.
The brand new app is accessible by way of TestFlight on iOS, and its code is on GitHub for anybody to clone.
Like different builders, Dorsey is using the vibe-coding bandwagon. However as a substitute of utilizing Cursor, Claude Code, or Windsurf, he says he’s utilizing an open-source coding instrument known as Goose.
Solar Day is straightforward to make use of. It reveals you the UV Index to your location together with particulars like cloud cowl, dawn, and sundown timings. You may select your pores and skin kind from six choices, and how much clothes you’re carrying. Based mostly on these parameters, the app will calculate how lengthy you’ll be able to expose your pores and skin to daylight earlier than it begins to burn.
Picture Credit score: TechCrunch
The app additionally reveals your minimal vitamin D consumption. Begin a session by tapping on the “Monitor UV Publicity” button, and after the session is ended, the app will present how a lot vitamin D you’ve gained all through the session, and within the day.
