Simple to use and great customer support
This app does exactly what it says and is super simple to use. Get the information you are needing quickly. Great response time and support from the developer when I encountered an issue.
$0.99
About
Calculate precise daylight and twilight times for pilots and outdoor professionals. This app performs all celestial calculations internally, requiring no internet connection for core functionality. It supports GPS locations, global airports, and even addresses when online, with accurate historical and future data.
✓Offline celestial calculations
✓Sunrise and sunset at GPS location
✓Twilight times (Civil, Nautical, Astronomical)
✓Data for 11,000+ airports
✓60 years of historical/future data
✓Includes FAA regulations
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What's New in Civil Twilight Calculator
1.26
January 5, 2026
Updated for iOS 26. many small code tweaks.
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FAQ
Does Civil Twilight Calculator work offline?
Yes, Civil Twilight Calculator performs all core celestial calculations internally, meaning it does not require an internet connection for its primary functions like calculating sunrise, sunset, and twilight times at your GPS location.
How accurate are the twilight calculations in Civil Twilight Calculator?
The app calculates sunrise and sunset accurately forwards and backwards in time for 60 years. It also offers improved time zone accuracy when an internet connection is available.
What types of twilight does Civil Twilight Calculator provide?
Civil Twilight Calculator provides regular (standard) Sunrise/Sunset, Civil Twilight, Nautical Twilight, and Astronomical Twilight. This comprehensive data is useful for various outdoor activities and aviation needs.
Can I find twilight times for specific airports using Civil Twilight Calculator?
Yes, the app includes built-in coordinates for over 11,000 airports worldwide, allowing you to find sunrise and sunset times for any of them directly within the application.
What FAA regulations are included in Civil Twilight Calculator?
Civil Twilight Calculator contains the relevant FAA regulations for daylight and night definitions, serving as a quick reference for pilots and aviation professionals who need to understand these distinctions.
What devices is Civil Twilight Calculator compatible with?
Civil Twilight Calculator is available for iPhone, iPad, and iPod devices. It was last updated on January 5, 2026, indicating ongoing support.
How much does Civil Twilight Calculator cost?
Civil Twilight Calculator is a paid application, priced at $0.99. It does not feature in-app purchases or advertisements, offering a straightforward purchase for full functionality.
Does Civil Twilight Calculator have ads?
No, Civil Twilight Calculator is ad-free. The application does not contain advertisements, providing an uninterrupted user experience.
