Sunlight: UV Index Tracker
Daylight Forecast & Sun Safety
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Plan outdoor time with current and hourly UV, recorded daylight, reminders, and calm guidance for healthier sunlight habits.
Make sunlight part of a healthier daily rhythm.
Sunlight combines local UV forecasts with your recorded Time in Daylight to help you plan outdoor time, follow your habits, and understand changing conditions throughout the day.
See UV clearly
• Check the current UV index, category, temperature, and local conditions.
• Follow the hourly UV forecast from morning through sunset.
• Read practical sun-safety and UV-protection guidance.
• Use your current location or choose a city manually.
Choose a better time outside
• Find a preferred outdoor window based on hourly UV and your schedule.
• See how conditions change before and after the daily peak.
• Set forecast-aware reminders for useful moments.
Record your daylight habit
• Read Time in Daylight from Apple Health with your permission.
• Start and stop manual outdoor sessions when you need them.
• Combine overlapping Health and manual records without double-counting.
Understand your patterns
• Review weekly and monthly daylight trends.
• Explore timing, consistency, source coverage, and daily evidence.
• Follow habit progress and useful context from four Home Screen widgets.
Personal, private, and optional
Sunlight does not require an account. Apple Health access is read-only. Manual sessions, preferences, and the optional self-reported skin response profile stay on your device. There are no ads or third-party analytics.
Sunlight Pro unlocks outdoor planning, daylight tracking, personalization, reminders, Trends, and three advanced widgets. Choose monthly access or a one-time lifetime purchase. Both unlock the same Pro features.
Important
Sunlight is for general wellness, informational, and planning purposes only. UV forecasts come from Apple Weather. Time in Daylight and manual sessions represent recorded outdoor time, not guaranteed direct sunlight. Personal UV exposure context, skin-response ranges, and Vitamin D sunlight opportunity are qualitative or modeled estimates—not direct sensor measurements, medical advice, diagnoses, treatment, precise Vitamin D production, exact burn timers, or guarantees of safe exposure or safe tanning.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Hello everyone!
This update improves Sunlight widgets with more reliable daily forecast refreshes and clearer, time-aware UV information throughout the day. It also includes bug fixes for a smoother, more dependable Sunlight experience.
Thank you for being part of Sunlight!
The developer, 子涵 王, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 子涵 王
- Size
- 3.3 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Sunlight Pro Lifetime $9.99
- Sunlight Pro Monthly $1.99
- Copyright
- © 2026 Zihan Wang