Jack Dorsey Launches Sun Day App Tracking Sun Exposure

Block CEO and Twitter co-founder Jack Dorsey has recently launched a new app called Sun Day, which provides users with an estimate of their sun exposure. The app, available through Apple’s TestFlight, uses location services to track the current UV index and estimate sun exposure based on the user’s location. It also requires manual input from users, who need to tap a button when they are exposed to the sun and again when they return indoors. The app factors in various data points, including age, type of clothing, skin tone, and historical data from the Apple Health app.

Sun Day aims to provide personalized and accurate estimates of vitamin D synthesis from UV exposure using a multifactor model based on scientific research. The app’s white paper emphasizes its conservative approach to safety, ensuring that users receive reliable information. Future improvements for the app include more precise calculations based on height and weight, seasonal adjustments, and the integration of actual vitamin D blood tests.

This launch marks Dorsey's second app in two weeks, following the beta version of Bitchat, a decentralized peer-to-peer messaging service that operates entirely over Bluetooth. Dorsey has been exploring various technologies, including Bluetooth mesh networks, relays, store and forward models, and message encryption models. He has also been utilizing Block’s artificial intelligence assistant, Goose, to develop these apps.

Dorsey's recent ventures into AI and decentralized technologies reflect his ongoing commitment to innovation and his belief in the transformative potential of these technologies. The launch of Sun Day and Bitchat underscores his interest in creating meaningful and impactful tools that leverage cutting-edge technology. These developments are likely to have a significant impact on the tech landscape, pushing the boundaries of what is possible with current technologies.

The introduction of these apps also raises important questions about the future of technology and its role in society. As AI and decentralized systems become more prevalent, it is crucial to consider their implications for privacy, security, and ethical use. Dorsey's work in this area is likely to contribute to ongoing discussions about the responsible development and deployment of these technologies.

In summary, Jack Dorsey's new app, Sun Day, which tracks sun exposure, is a testament to his ongoing exploration of AI and decentralized technologies. Alongside Bitchat, these apps demonstrate his commitment to innovation and his belief in the potential of these technologies to transform various aspects of digital communication and interaction. As the tech industry continues to evolve, Dorsey's contributions are likely to play a significant role in shaping its future.