GyroCop
Compass Error Calculator
Only for iPhone
Free
iPhone
GyroCop is a practical marine compass check tool designed for seafarers.
The app helps officers perform celestial compass checks using the Sun, Moon, planets and bright stars. It supports clear bridge workflows for calculating magnetic course, deviation and final compass error.
Main features:
• Celestial compass check calculations
• Sun, Moon, planets and bright stars support
• Magnetic course and compass error calculation
• Vessel deviation card storage
• Deviation curve view
• Check history and reports
• Clean dark maritime interface
GyroCop is designed for practical bridge use and training.
Important:
GyroCop is a calculation aid only. It does not replace official navigation equipment, approved onboard procedures, nautical publications, class/company requirements, or the professional judgment of the officer on watch.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Magnetic compass checks just got sharper.
This update adds automatic magnetic variation calculation using WMM2025 from your entered position and date, plus a new mode for calculating deviation from an observed compass course.
Device GPS position entry is now smoother too: fields lock while updating, then give clear success feedback when the position is applied.
Less manual math, fewer compass-card headaches.
The developer, Dlyaver Alchik, 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 indicated that this app doesn’t support certain accessibility features. Learn More about the accessibility features.
Information
- Seller
- Dlyaver Alchik
- Size
- 15.2 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Dlyaver Alchik