Jack Dorsey Launches Sun Day App to Help Users Track Sunlight and Boost Vitamin D

Twitter co-founder Jack Dorsey is back in the spotlight with the release of Sun Day, a wellness app designed to help users monitor their sun exposure and optimize vitamin D intake.

The innovative app uses real-time location data to analyze UV levels, skin type, and clothing coverage, offering personalized suggestions on how long to stay in the sun.

It also provides additional insights such as sunrise and sunset times, cloud coverage, and safe exposure limits to prevent sunburn.

Sun Day aims to promote healthier lifestyles by encouraging safe sun habits particularly valuable for people in regions with limited sunshine or those concerned about vitamin D deficiency.

The app’s release comes just days after Dorsey unveiled Bitchat, a groundbreaking offline messaging app that operates entirely without internet access using Bluetooth mesh networking.

With these back-to-back launches, Dorsey continues to push boundaries in both wellness and decentralized tech solutions.