About Solar Day
Solar awareness for daylight, seasons & energy planning
Solar Day
Solar Day is a clean, privacy-first app for understanding today’s daylight hours and your position in the solar year.
Designed for people who rely on natural light — whether for solar energy systems, off-grid living, photovoltaic power, battery charging, or personal wellbeing — Solar Day provides a clear view of sunrise, sunset, solar angle, and seasonal change.
Free Version
• Daylight duration
• Sunrise and sunset (local time)
• Seasonal solar year graphic
• Days to next solstice
• 7-day daylight change
• Manual location entry or GPS
Solar Day helps you build real intuition about daily and seasonal sunlight patterns — without notifications, accounts, or distractions.
SolarDay Pro (One-Time Upgrade)
SolarDay Pro adds deeper solar energy context and planning tools:
• Solar Effectiveness (5-level indicator)
Negligible • Poor • Moderate • Good • Excellent
Combines seasonal solar inclination with atmospheric conditions
(cloud cover and haze reduce — but never increase — the seasonal baseline)
• Effective Sun Hours
• Effective Sun Window
• 3-Day Cloud Cover Outlook
• Solar Inclination Graphic (visual sun angle)
• Contextual seasonal guidance
No subscriptions. One purchase. Lifetime unlock.
Payments are securely handled by Google Play.
Privacy
Solar Day is built with respect for users.
• No accounts
• No ads
• No analytics
• No tracking
Core solar calculations run entirely on your device.
If you use SolarDay Pro, cloud cover data is retrieved from a public weather service to provide short-term atmospheric context. No personal data is collected, stored, or sold.
Solar Day is developed by Sparrow Hill — thoughtful tools built with clarity and restraint.
What's new in the latest 3.0.2
Privacy-focused solar awareness app
Understand daylight, solar angle, and seasonal progression
Solar Day APK Information
Old Versions of Solar Day
Super Fast and Safe Downloading via APKPure App
One-click to install XAPK/APK files on Android!




