Named Sun Day, the app tracks UV exposure and vitamin D intake for users at their location. It is currently available via ...

Jack Dorsey, co-founder of Twitter, has launched his second app within a week, Sun Day, designed to help users track their vitamin D intake.

Twitter co-founder Jack Dorsey has released a new app that tracks your sun exposure and vitamin D levels. It’s his second app ...

Jack Dorsey launches Sun Day to track UV exposure and Vitamin D intake, following his Bluetooth-based messaging experiment ...

Jack Dorsey is shipping. On Sunday, the Twitter co-founder shared a link on X (formerly Twitter) to a new app called Sun Day, ...

Jack Dorsey has launched Sun Day, an iOS app that tracks UV exposure and estimates vitamin D levels based on location, skin ...

The app is open source, with its code published on GitHub, and it’s the latest in Dorsey’s experimental “weekend builds” — ...

After launching Bitchat, Jack Dorsey has introduced another experimental app called Sun Day, designed to track users’ sun ...

Another day, another app from Jack Dorsey. The Twitter co-founder has announced an app called Sun Day just one week after ...

The new app called Sun Day tracks your UV exposure as well as Vitamin D levels. Last week, Dorsey introduced a new Bluetooth ...

Twitter co-founder Jack Dorsey's new app, called Sun Day, ostensibly helps users track UV exposure and Vitamin D intake.