GPS Anti Spoof App Reviews

GPS Anti Spoof App Description & Overview

What is gps anti spoof app? Instantly compare observed celestial navigation altitudes with high precision, live calculated altitudes. Shoot the Sun, tap pause in the app, and get instant feedback.

Standard version includes data for the Sun, Venus, and two stars. The Pro version of the app is for serious navigation use and includes data for the Sun, Moon, Venus, Mars, Jupiter, Saturn, the 57 standard navigational stars, plus Polaris. Both versions function off-network and at sea however the standard version only works for ten days off-network. The Pro version can function for weeks in the middle of the ocean without network access.

This app calculates the exact sextant altitude that should be observed in celestial navigation at sea or on land assuming that the GPS position is correct. No paperwork is required, no tables of corrections. All corrections are included automatically: index error, system time error, dip of the horizon, refraction, temperature and pressure corrections to refraction, altitude above sea level, parallax, and also gravitational deflection of the vertical (a correction of up 2 nautical miles not handled by any other celestial navigation sight-clearing product) are all included automatically. If the GPS position is wrong, due to Spoofing at sea, observations will not match. With this app and occasional quick sextant sights, mariners can reliably detect GPS spoofing.

No GPS Spoofing? The app also functions as a celestial navigation trainer: take a sextant sight and immediately compare against the app's display. No paperwork and instant feedback will improve celestial sextant skills in hours instead of days or weeks. 

The app works off-network, even in the middle of the ocean. If a network connection is available, the app will download temperature and pressure information automatically. Or weather data can be entered manually, if desired.

The ephemeris data is generated from the same JPL numerical integrations of lunar and planetary motions used by the official Nautical Almanac and Astronomical Almanac. All coordinates are accurate to one second of arc, and displayed altitudes are accurate to a tenth of a minute of arc.

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GPS Anti Spoof Comments & Reviews 2026

GPS Anti Spoof 1.40 Tips, Tricks, Cheats and Rules

What do you think of the GPS Anti Spoof app? Can you share your complaints, experiences, or thoughts about the application with Frank Reed and other users?

GPS Anti Spoof 1.40 Apps Screenshots & Images

GPS Anti Spoof iphone, ipad, apple watch and apple tv screenshot images, pictures.

GPS Anti Spoof (Versiyon 1.40) Install & Download

The application GPS Anti Spoof was published in the category Education on 16 June 2019, Sunday and was developed by Frank Reed [Developer ID: 1379926230]. This program file size is 11.53 MB. This app has been rated by 3 users and has a rating of 5 out of 5. GPS Anti Spoof - Education app posted on 04 June 2026, Thursday current version is 1.40 and works well on iOS 11.0 and higher versions. Google Play ID: com.clockwk.GPS-Anti-Spoof. Languages supported by the app: