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 ...

A breakthrough in trade talks with the U.S. might win Ishiba a reprieve, but so far there's been scant sign of progress in ...

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

Dorsey's initial investment has gotten the new nonprofit "andOtherStuff" up and running, and he worked on some of its initial iOS apps.

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

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 ...

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