Back in business, starting the second time this week, is Twitter co-founder Jack Dorsey. The target of this new application is to check your body's vitamin D levels on the iPhone.

Name and Purpose of The Application
Although the new application from Jack Dorsey is yet to be named publicly, it has been said that it is to measure the wellness of the person using it with the iPhone sensors and the presence of light. The app enters daylight measures each day for a person and thereby determines the Vitamin D level.
How The Application Works
This app uses an iPhone light sensor along with the location information that judge the amount of time the user has spent in sunlight exposure. Then, it calculates the amount of Vitamin D produced by the body: too much outdoors or too less in sunshine. Hence, the app notifies the user and suggests going outside.
Health-tracking Focus
These days, most people are health-conscious and use health apps. At this time, the press-aided Dorsey app has attracted the attention of the people. There are many health problems, like bone damage, tiredness, depression, lack of vitamin D, etc. Therefore, sunlight consumption and vitamin D monitoring can effectively regulate health.
Connect Also to The Earlier App
Just a few days ago, Dorsey launched another similar app, which is for meditation and tracking sleep: "Winddown", and it dovetails with the new vitamin D tracker app. These new applications are both under Dorsey's company, Y Block's TBD Health Lab, which ostensibly strives to facilitate technology in health matters.

Why Is Jack Dorsey Reflecting This?
Jack Dorsey has always put a personal emphasis on health and awareness. Meditating, fasting, and living the lifestyle ary health-oriented lifestyle. Hence, the new apps are likewise tilted toward that same view, asserting such by bringing in technology.
The new application on the iPhone connects health and technology in a fairly simple way to check vitamin D. The app could provide a new possibility for people who have too busy a life to consider health, or for those individuals who stay mostly indoors. Indeed, this attempt from Jack Dorsey is a major step in digital health tracking.
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