# GPS Anti Spoof Pro vs EZ Celestial Navigation

The clearest difference is price: GPS Anti Spoof Pro at $19.99 against EZ Celestial Navigation's $29.99. GPS Anti Spoof Pro also leads on iOS requirement (11.0 vs 13.0). EZ Celestial Navigation's advantage is update cadence (monthly vs every 5 months) and chart position (#91 vs unranked). On rating, review sentiment, ads and in-app purchases there is nothing between them.

GPS Anti Spoof Pro costs $19.99 and EZ Celestial Navigation $29.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for GPS Anti Spoof Pro against 4.9 for EZ Celestial Navigation. Both are backed by a comparable volume of ratings — 7 and 26 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

GPS Anti Spoof Pro ships an update every 5 months, EZ Celestial Navigation monthly. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | GPS Anti Spoof Pro | EZ Celestial Navigation |
| --- | --- | --- |
| Price | **$19.99** | $29.99 |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/gps-anti-spoof-pro/id1379926231/reviews)** | [4.9 (26 ratings)](https://appshunter.io/ios/app/ez-celestial-navigation/id1547239240/reviews) |
| Number of ratings | 7 | **26** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Paid | Paid |
| Best chart rank | — | **#91** |
| Size | 12 MB | 153 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Frank Reed](https://appshunter.io/developer/1379926230) | [EZ Celestial LLC](https://appshunter.io/developer/504153123) |

## What reviewers say

### GPS Anti Spoof Pro

[App page](https://appshunter.io/ios/app/gps-anti-spoof-pro/id1379926231)

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.

**Highlights:** Celestial altitude comparison, GPS spoofing detection, Celestial navigation trainer, Automatic correction calculations, Offline functionality, Sun, Moon, planet, and star data

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### EZ Celestial Navigation

[App page](https://appshunter.io/ios/app/ez-celestial-navigation/id1547239240)

**Currently charting:** #91 Top Paid · Navigation (US App Store)

This app simplifies celestial navigation using a sextant, providing tools to calculate your position at sea. It offers automated calculations or manual table access, with features for observation archiving and compass checks. Ideal for learning and practicing traditional navigation methods.

**Highlights:** Automated sight reduction and LOP plotting, Manual Nautical Almanac and Pub. 229 table access, Observation archiving and restoration, Compass check functionality, Printable Nautical Almanac pages and reports, Universal app for iOS and macOS

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is GPS Anti Spoof Pro free?

GPS Anti Spoof Pro costs $19.99, with no in-app purchases.

### Is EZ Celestial Navigation free?

EZ Celestial Navigation costs $29.99, with no in-app purchases.

### Which has better reviews, GPS Anti Spoof Pro or EZ Celestial Navigation?

GPS Anti Spoof Pro is rated higher. GPS Anti Spoof Pro averages 5.0 out of 5 from 7 ratings, while EZ Celestial Navigation averages 4.9 from 26 ratings.

### Do GPS Anti Spoof Pro or EZ Celestial Navigation have ads?

Neither GPS Anti Spoof Pro nor EZ Celestial Navigation shows ads.

### Which is updated more often, GPS Anti Spoof Pro or EZ Celestial Navigation?

GPS Anti Spoof Pro ships an update every 5 months, and EZ Celestial Navigation monthly. Most recently, GPS Anti Spoof Pro was updated on November 2, 2026 and EZ Celestial Navigation on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*