# NavRules vs Celestial Nav

The clearest difference is price: Celestial Nav at Free against NavRules's $15.99. Celestial Nav also leads on rating (4.3 vs 3.8) and update cadence (every 3 weeks vs every 13 months). NavRules's advantage is in-app purchases (none vs 6) and chart position (#9 vs unranked). On review sentiment, ratings volume, ads and device support there is nothing between them.

Celestial Nav is free to download; NavRules costs $15.99 up front. Celestial Nav sells 6 in-app purchases, starting at $1.99 per month. NavRules asks for nothing beyond the download.

Celestial Nav holds the better App Store score, 4.3 against 3.8. Both are backed by a comparable volume of ratings — 18 and 10 respectively. Written reviews complicate that: 68% of NavRules's written reviews are positive against 64% of Celestial Nav's, so the app with the better star average is not the one people write more warmly about.

NavRules ships an update every 13 months, Celestial Nav every 3 weeks. The most recent releases landed on October 13, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | NavRules | Celestial Nav |
| --- | --- | --- |
| Price | $15.99 | **Free** |
| Rating | [3.8 (18 ratings)](https://appshunter.io/ios/app/navrules/id423125556/reviews) | **[4.3 (10 ratings)](https://appshunter.io/ios/app/celestial-nav/id1569880598/reviews)** |
| Number of ratings | **18** | 10 |
| Positive reviews | **68.0% of reviews** | 64.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 3 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | **#9** | — |
| Size | 17 MB | 20 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mintaka Innovations](https://appshunter.io/developer/1207417949) | [Skytip LLC](https://appshunter.io/developer/1569880600) |

## What reviewers say

### NavRules

[App page](https://appshunter.io/ios/app/navrules/id423125556)

**Currently charting:** #9 Top Paid · Navigation (US App Store)

Master nautical navigation rules with practice exams and a comprehensive rule book. Focus your learning by customizing tests based on question type, rule, and filter. Track your progress and review answers with detailed explanations.

**Highlights:** Customizable practice exams, International and US Inland rules, Question filtering by text or rule, Progress tracking by rule, Flash card mode with diagrams, Integrated Rule Book, Over 1200 questions

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

**In-app purchases:** none


### Celestial Nav

[App page](https://appshunter.io/ios/app/celestial-nav/id1569880598)

This app provides tools for celestial navigation, offering computations for celestial bodies and sight reductions. It includes an offline perpetual almanac and allows for quick capture of observation data for accurate course adjustments.

**Highlights:** Celestial navigational computations, Offline perpetual almanac, Quick celestial observation data capture, High accuracy sight reductions, Sight planning and reduction tools, Celestial fix computations

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Version | $1.99 | per month |
| PRO Version | $7.99 | per 6 months |
| PRO Version | $9.99 | per year |
| 7 Day Trial License | $0.99 | one-time |
| 30 Day Trial License | $2.99 | one-time |
| PRO Version Lifetime | $24.99 | one-time |


## Frequently asked questions

### Is NavRules free?

NavRules costs $15.99, with no in-app purchases.

### Is Celestial Nav free?

Celestial Nav is free to download, with in-app purchases available.

### Which has better reviews, NavRules or Celestial Nav?

Celestial Nav is rated higher. NavRules averages 3.8 out of 5 from 18 ratings, while Celestial Nav averages 4.3 from 10 ratings.

### Do NavRules or Celestial Nav have ads?

Neither NavRules nor Celestial Nav shows ads.

### Which is updated more often, NavRules or Celestial Nav?

NavRules ships an update every 13 months, and Celestial Nav every 3 weeks. Most recently, NavRules was updated on October 13, 2026 and Celestial Nav on October 1, 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.*