Jack Dorsey Launches “Sun Day”, Check How Long You’ve Been in the Sun and Touch Grass!

Jakarta, Pintu News – Twitter founder and Block CEO, Jack Dorsey, has made another splash in the tech world by launching a new app called “Sun Day”. The app is designed to provide an overview of how much time users spend outdoors and exposed to sunlight. With manual tracking features and scientific models, Sun Day is claimed to help users estimate vitamin D levels obtained from UV exposure.

Sun Day: Track Sun Exposure and Vitamin D

Sun Day is an app that is still available in beta via Apple TestFlight. The app utilizes location services to find out the UV index in the user’s area. In addition, the app asks for additional data such as age, clothing type, and skin color to estimate the amount of vitamin D the body can absorb from sun exposure.

The app can also pull in health data from Apple Health as well as vitamin D history records stored in HealthKit. With all this data combined, Sun Day uses a scientific research-based multifactor model to provide a safe, personalized estimate of the user’s vitamin D production.

Also Read: Binance CZ: “There Will Be More Declines, It’s an Accumulation Phase!” – What Does It Mean for Investors?

How It Works: Manual Input and Upcoming Features

Unlike other activity tracking apps, Sun Day requires manual input from the user. When going out to sunbathe or leave the house, the user has to press the “on” button, and then turn it off when back indoors. The app does not automatically detect light, but only records the time based on user input.

Jack Dorsey explained on X (formerly Twitter) that the app is manual to maintain accuracy and privacy. In the future, planned feature developments include more precise calculations based on height and weight, seasonal adjustments, and integration with vitamin D blood test results directly.

Another Innovation from Jack Dorsey: Bitchat and Artificial Intelligence

The Sun Day app is not Dorsey’s only innovation in the near future. Previously, he also released a beta app called “Bitchat”, a decentralized peer-to-peer messaging service that works using Bluetooth. Through this application, messages can be sent without the need for a direct internet connection, but through a Bluetooth mesh network.

Dorsey also revealed that he uses Block’s AI assistant, Goose, to help develop his new apps. This successive innovation shows Dorsey’s commitment to encouraging the use of technology to improve healthy lifestyles and digital privacy.

Conclusion

With the launch of the Sun Day app, Jack Dorsey wants to encourage people to be more aware of the importance of sun exposure for health, especially in the production of vitamin D. In addition, this app is an example of digital innovation that combines science, technology, and personalization for the well-being of users.

Also Read: Big Drama: Coinbase and Binance Deny Each Other Over Media Leaks and Market Grab!

That’s the latest information about crypto. Follow us on Google News for the latest crypto and blockchain technology updates. Enjoy an easy and secure crypto trading experience by downloading Pintu crypto app via Google Play Store or App Store now.

Experience web trading with advanced trading tools such as pro charting, various order types, and portfolio tracker only at Pintu Pro. Pintu Pro Futures is also available, where you can buy bitcoin leverage, trade btc futures, eth futures and sol futures easily from your desktop!

*Disclaimer

This content aims to enrich readers’ information. Pintu collects this information from various relevant sources and is not influenced by outside parties. Note that an asset’s past performance does not determine its projected future performance. Crypto trading activities are subject to high risk and volatility, always do your own research and use cold hard cash before investing. All activities of buying andselling Bitcoin and other crypto asset investments are the responsibility of the reader.

Reference

• Cointelegraph. Jack Dorsey’s new app tracks how much ‘grass touching’ you do. Accessed July 15, 2025.