Sunshinepal – Automatic sunlight tracking using Apple Watch sensors

Summary: SunshinePal uses the ambient light sensors in Apple Watch Series 6 or later to automatically track your daily time spent in daylight via HealthKit, requiring no manual input. It visualizes 7-day sunlight exposure trends and allows setting daily sunlight goals while keeping all health data private on the device.

What it does

SunshinePal reads hidden "Time in Daylight" data from the Apple Watch and presents it through daily goals and trend visualizations. It operates automatically when worn, syncing data via HealthKit without user intervention.

Who it's for

It is designed for Apple Watch users seeking to monitor and improve their sunlight exposure to support sleep and circadian rhythm health.

Why it matters

It addresses the challenge of measuring sunlight exposure, helping users optimize their circadian rhythm and sleep by encouraging time spent outdoors.