The Sun Day app, out in beta, prompts you on how to prep for being out and about for your specific skin type and location.

Asian markets are mixed after U.S. stock indexes hit new records on Monday. Oil prices fell and U.S. futures were little ...

Tech entrepreneur Jack Dorsey has released a pair of apps recently, continuing his focus on decentralized communication. Tech ...

Jack Dorsey has been back in the news lately after unveiling a pair of new apps he worked on, Bluetooth-based messenager ...

This marks the second new app Dorsey has launched in a week. But this one may especially appeal to Gen Z, whose tanning ...

Twitter co-founder Jack Dorsey has introduced a new wellness-focused app called Sun Day, designed to help users monitor sun ...

Jack Dorsey, co-founder of Twitter, has launched a new app called Sun Day. This app helps users track their Vitamin D levels.

Jack Dorsey, a co-founder of Twitter, is developing a lot of apps. Earlier this month, Dorsey released Bitchat, a ...

"Jack Dorsey's new app Sun Day is exciting, not to detect vitamin D levels but really to help us understand our UV index ...

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

Twitter co-founder and Block CEO Jack Dorsey has launched a new peer-to-peer messaging app that runs entirely over Bluetooth without requiring internet service.