Jack Dorsey's new app tracks your sun exposure
Another day, another app from Jack Dorsey. The Twitter co-founder has announced an app called Sun Day just one week after releasing the peer-to-peer messaging app Bitchat. While Bitchat is an internet-free app for communicating with friends over Bluetooth, Sun Day is all about, well, the sun. The latest app tracks your UV exposure and how much Vitamin D you get. It does this using a few personal details, including your location. Sun Day also asks you to share what kind of clothing you're wearin