Sun Day Tracker
Jack Dorsey
About this app
- Category Health & Fitness
- Age 10
- Updated Jul 14, 2025
- OS IOS
Editor reviews
Sun Day Tracker is a health and fitness app that helps you build safer sun habits, reach vitamin D goals, and protect your skin. It provides real time UV index, personalized safe exposure windows, and smart reminders to reapply sunscreen and take shade breaks.
Core features include location based UV forecasts with hourly risk levels, a vitamin D estimate from sunlight and outdoor time, and simple logs and weekly trends to track exposure and sunscreen use. Designed for everyday wellness, this sun exposure tracker makes it easy to plan daylight, reduce burn risk, and support circadian rhythm. Keywords include UV index app, vitamin D tracker, sunscreen reminder, sun exposure tracker, health and fitness.
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How to use:
1. Download and open the app, then allow location access for accurate UV index and local forecasts. Optionally connect Apple Health or Google Fit to import outdoor time.
2. Create your profile by selecting skin type, typical SPF, and your vitamin D or outdoor time goal.
3. Check the home screen for the live UV index, safe exposure window, and a sunscreen reapply timer tailored to your profile.
4. Plan your day using the hourly UV forecast and sunrise and sunset times, and enable reminders for sunscreen, shade, and morning light.
5. Log outdoor sessions and sunscreen applications, then review Trends for weekly exposure insights and vitamin D estimates to adjust your routine.