Someone should go and check on Jack Dorsey. The Twitter co-founder and former head has launched Sun Day, his second app in as many weeks. Either he’s doing exceedingly well or struggling just a little bit. Either way, it’d be a great idea to find out what’s going on (and, if needed, his productivity secrets).
Sun Day is an app that lets you “track your vitamin d from the sun”. You’d think that would be obvious, but it could just as easily be a church activity scheduling application. Still, sunlight is the main focus of the still-in-beta app.
What a lovely Sun Day
More specifically, the app “calculates vitamin D synthesis from UV exposure using a multi-factor model based on scientific research”. That’s a little more detailed than most apps, with the entire methodology for its calculations laid out on its GitHub page. It’ll give up figures for users in various states of dress (or undress), factoring in age, skin type, and cloud cover thanks to Apple HealthKit integration.
It’s not a superintelligent app just yet, requiring manual input from users when they enter or leave sunlight. A button tapped in the app starts and ends tracking. Integration with light sensors in smartphones and wearables would make it a more effective tool, but that doesn’t seem to be planned as yet.
It is in beta, after all, with Apple TestFlight users able to sign up to test the app (and their vitamin D metrics). Development will be ongoing, with user height and weight being added as tracking factors later. Also planned is the ability to add blood test results that look at vitamin D levels for a more complete picture of what’s going on between users and their sunlight exposure.
