Jack Dorsey, co-founder of Twitter and CEO of Block, has recently launched a new beta application called "Sun Day." This app aims to help users monitor their sun exposure and estimate vitamin D synthesis. It's the second app Dorsey has released in as many weeks, showcasing his recent focus on app development and learning.
Key Takeaways
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"Sun Day" is Jack Dorsey's second app launch in two weeks, following a decentralized peer-to-peer messaging service called Bitchat.
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Dorsey stated his recent app development spree is part of a personal learning process.
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He revealed that he is using Block's artificial intelligence assistant, Goose, to aid in the creation of these applications.
Dorsey's Latest Venture: Sun Day App
Jack Dorsey's new "Sun Day" app, currently in beta via Apple's TestFlight, is designed to provide users with an estimate of their sun exposure and subsequent vitamin D synthesis. The app utilizes a multifactor model based on scientific research, as detailed in its white paper on GitHub.
How Sun Day Works
The "Sun Day" app relies on user input and various data points to calculate sun exposure:
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Manual Toggling: Users must manually tap a button when they begin sun exposure and again when they move indoors.
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Location Services: The app uses location data to track the current UV index.
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Personalized Data: It requests user input on age, clothing type, and skin tone.
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Health Integration: The app incorporates data from Apple Health, including historical HealthKit vitamin D records.
Dorsey emphasized that the app's calculations are designed to be conservative for safety. Future updates may include more precise calculations based on height and weight, seasonal adjustments, and actual vitamin D blood test results.
Dorsey's Recent App Development Spree
This launch follows closely on the heels of Dorsey's beta release of Bitchat, a decentralized peer-to-peer messaging service that operates entirely over Bluetooth. Dorsey has been actively engaged in learning about various technologies, including Bluetooth mesh networks, relays, and message encryption models. When asked if these app launches were part of a strategy to flood the market, Dorsey simply responded, "Nah. I'm learning".
Sources
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Jack Dorsey’s New Sun Day App Claims to Keep Safe in the Sun, Cointelegraph.
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