AstroSol
Solar noon & Sun tracker
Free · Designed for iPad. Not verified for macOS.
AstroSol is a precise, educational solar calculator.
Enter coordinates (or use your location) to get:
• True Solar Noon (hh:mm:ss)
• Sunrise & Sunset (apparent, rounded to minute)
• Azimuth & Elevation at the current local time
• Equation of Time and Solar Declination
• Local time zone and UTC offset for the place
Accuracy you can trust
AstroSol implements Jean Meeus–style solar algorithms in the spirit of NOAA’s public calculator. Results are rounded like NOAA (no atmospheric refraction for Az/El at current time; sunrise/sunset use an apparent solar radius/zenith of ~90.833°).
Works offline
No signal? You can still compute:
• All solar values from coordinates
• Approximate place names & time zones using an on-device gazetteer (when available).
A brief online session after the first launch lets AstroSol download a compact city list for fully offline use.
Thoughtful details
• Decimal or DMS inputs with hemisphere toggles
• Locale-aware formatting (commas/dots)
• One-tap copy for every numerical result
• Pull-to-refresh to recalc and re-check connectivity
• Clear “About & Help” with formulas, credits, and tips
Privacy
No accounts. No ads. No analytics. Location is used only on-device to compute solar data and, if you ask, to set your coordinates.
Credits
Meeus-style solar math; NOAA rounding conventions. Offline city data derived from GeoNames (see in-app credits). Time zone resolution uses iOS frameworks when online.
Not for navigation or safety-critical use.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Bug fixes and improvements
- Fixed an issue that could offset the Sun's azimuth near true solar noon (DST handling).
- New: shows Geometric (no refraction) and Apparent elevation; details added to the Info page.
- Minor UI polish and copy-to-clipboard; localization consistency.
The developer, Alex Olinger, 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
- Alex Olinger
- Size
- 39.1 MB
- Category
- Weather
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - iPad
Requires iPadOS 17.6 or later. - Mac
Requires macOS 14.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.3 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2025 Alex Olinger