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GPS Anti Spoof Pro

GPS Anti Spoof Pro

sextant sight analyzer

7 ratings
2 reviews
📚 Education
🗺️ Navigation
$19.99

Details

Released
June 11, 2019
Updated
June 4, 2026

Features

Developer

Frank Reed
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About

Instantly compare observed celestial navigation altitudes with calculated ones. This app helps mariners detect GPS spoofing and functions as a celestial navigation trainer. It automatically includes all necessary corrections for accurate readings.

✓Celestial altitude comparison
✓GPS spoofing detection
✓Celestial navigation trainer
✓Automatic correction calculations
✓Offline functionality
✓Sun, Moon, planet, and star data
Show original description

What's New in GPS Anti Spoof Pro

1.40

June 4, 2026

maintenance update

User reviews

Most RecentHighest RatedLowest Rated

Delivers on claims!

Frank is a genius for developing this app. I’m a novice so checking my sights against the app is a godsend! Also, doesn’t collect any data from my phone or the app. Appreciate the privacy. I do wish I could turn off all features which use internet connectivity when present.
JSJib Sheet

Works as Advertised!!

This app is fantastic for checking your GPS.
Excellent for educational purposes to check celestial sights.
I highly recommend this app.
CCGrosby

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FAQ

What is GPS Anti Spoof Pro used for?

GPS Anti Spoof Pro is used to compare observed celestial navigation altitudes with live calculated altitudes. It helps mariners detect GPS spoofing and also serves as a celestial navigation trainer.

Does GPS Anti Spoof Pro work offline?

Yes, GPS Anti Spoof Pro works off-network and can function for weeks without network access, making it ideal for use in the middle of the ocean.

What celestial bodies can GPS Anti Spoof Pro track?

The Pro version includes data for the Sun, Moon, Venus, Mars, Jupiter, Saturn, the 57 standard navigational stars, and Polaris.

How accurate are the calculations in GPS Anti Spoof Pro?

The ephemeris data is highly accurate, with coordinates precise to one second of arc and displayed altitudes accurate to a tenth of a minute of arc.

Does GPS Anti Spoof Pro require paperwork?

No, GPS Anti Spoof Pro eliminates the need for paperwork. All necessary corrections are included automatically, and feedback is instant.

What is the price of GPS Anti Spoof Pro?

GPS Anti Spoof Pro is a paid application priced at $19.99.

How often is GPS Anti Spoof Pro updated?

The latest version is 1.0.39, and the app was last updated on September 1, 2025. Updates ensure continued reliability and accuracy.

What devices support GPS Anti Spoof Pro?

GPS Anti Spoof Pro is supported on iPhone, iPad, and iPod devices.