Sunwise: Sunlight & Vitamin D

Sunwise helps you make outdoor light part of your day with practical, forecast-aware guidance.

See a recommended sunlight window based on your location, local conditions, UV levels, your availability, and the preferences you choose. Check the days ahead, start a timed session when you step outside, or add a session manually.

WITH SUNWISE YOU CAN

• Find a useful sunlight window for today
• Review hourly guidance across a seven-day forecast
• See UV conditions and clear skin-protection reminders
• Set a daily outdoor-light goal
• Start, pause, resume, and finish sunlight sessions
• Add past sessions manually
• View weekly minutes, sessions, goal days, and streak progress
• Receive optional forecast-aware reminders
• Learn from short, relevant sunlight and UV education cards
• Use your current location or save a fixed location
• Continue viewing recently cached forecasts when offline

DESIGNED WITH PRIVACY IN MIND

Sunwise does not require an account and does not include advertising or analytics in this version. Your profile, preferences, and session history are stored on your device. You can export your local data or erase it from the app at any time. Coordinates are sent to Open-Meteo only when needed to retrieve weather and UV forecasts.

IMPORTANT

Sunwise provides educational sunlight guidance, not medical advice. It cannot diagnose vitamin D deficiency, determine your vitamin D level, or replace a blood test or advice from a qualified health professional. Weather and UV forecasts can change. Use current conditions and appropriate sun protection when deciding how long to remain outdoors.