# EZ Celestial Navigation vs Rule Master

EZ Celestial Navigation and Rule Master both sit at 4.9 stars, but that hides the real split: 100% of EZ Celestial Navigation's written reviews are positive against 43% of Rule Master's. EZ Celestial Navigation also leads on update cadence (monthly vs every 3 months) and device support (3 vs 1). Rule Master's advantage is price ($9.99 vs $29.99) and ratings volume (292 vs 26). On rating, ads and in-app purchases there is nothing between them.

EZ Celestial Navigation costs $29.99 and Rule Master $9.99 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 — 4.9 for EZ Celestial Navigation against 4.8 for Rule Master. That said, the two scores are not equally well evidenced: Rule Master has 292 ratings behind it against 26, so its average is the more settled of the two. Written reviews are what separate them: 100% of EZ Celestial Navigation's written reviews are positive against 43% of Rule Master's.

EZ Celestial Navigation ships an update monthly, Rule Master every 3 months. The most recent releases landed on October 3, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | EZ Celestial Navigation | Rule Master |
| --- | --- | --- |
| Price | $29.99 | **$9.99** |
| Rating | **[4.9 (26 ratings)](https://appshunter.io/ios/app/ez-celestial-navigation/id1547239240/reviews)** | [4.8 (292 ratings)](https://appshunter.io/ios/app/rule-master/id1617543595/reviews) |
| Number of ratings | 26 | **292** |
| Positive reviews | **100.0% of reviews** | 42.9% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | #153 | **#30** |
| Size | 153 MB | 13 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [EZ Celestial LLC](https://appshunter.io/developer/504153123) | [Universal Queue LLC](https://appshunter.io/developer/1577058225) |

## What reviewers say

### EZ Celestial Navigation

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

**Currently charting:** #153 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


### Rule Master

[App page](https://appshunter.io/ios/app/rule-master/id1617543595)

**Currently charting:** #30 Top Paid · Navigation (US App Store)

Master maritime navigation rules with this comprehensive quiz app. It offers extensive question banks, custom filters, and detailed progress tracking for both new and experienced sailors. Generate custom exams and access a digital handbook for efficient learning and exam preparation.

**Highlights:** 10,000+ question-answer combinations, Custom question filters, Fill-in-the-blank questions, Offline capability, Exam PDF generation, Digital Navigation Rules handbook, Progress tracking and statistics

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 User friendly and easy to navigate
- 📚 Great information for studying and review
- 💯 Helpful for exam preparation and confidence
- ✨ Beautifully designed and functional app
- ✅ Worth a download

**What reviewers complain about**

- 💰 Free apps are just as good
- 🐛 Questions disappear off the screen
- 🤏 Diagrams are too small to see details
- ❓ Incomplete questions with missing text
- ⚠️ Some answers are not 100% accurate

**Reported bugs**

- Questions disappear off the bottom of the screen
- Diagrams are too small to identify vessels
- Some questions have character limits over the margin
- App doesn't display quiz and verbatim in a usable manner
- Incomplete questions showing three dots (...)

**Requested features**

- Link relevant COLREG rule when answering correctly and incorrectly
- Expand subjects to include chemistry or history
- Improvements in tracking missed questions for training
- Display full question text when it's cut off


## Frequently asked questions

### Is EZ Celestial Navigation free?

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

### Is Rule Master free?

Rule Master costs $9.99, with no in-app purchases.

### Which has better reviews, EZ Celestial Navigation or Rule Master?

EZ Celestial Navigation is rated higher. EZ Celestial Navigation averages 4.9 out of 5 from 26 ratings, while Rule Master averages 4.8 from 292 ratings.

### Do EZ Celestial Navigation or Rule Master have ads?

Neither EZ Celestial Navigation nor Rule Master shows ads.

### Which is updated more often, EZ Celestial Navigation or Rule Master?

EZ Celestial Navigation ships an update monthly, and Rule Master every 3 months. Most recently, EZ Celestial Navigation was updated on October 3, 2026 and Rule Master on October 15, 2026.

### Which is more popular, EZ Celestial Navigation or Rule Master?

EZ Celestial Navigation currently peaks at #153 in the App Store charts, and Rule Master at #30. Chart position reflects recent download velocity rather than total install base.

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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.*