# SEAiq vs EZ Celestial Navigation

The clearest difference is price: SEAiq at Free against EZ Celestial Navigation's $29.99. SEAiq also leads on ratings volume (193 vs 26). EZ Celestial Navigation's advantage is review sentiment (100% vs 61%) and in-app purchases (none vs 2). On update cadence, ads and device support there is nothing between them.

SEAiq is free to download; EZ Celestial Navigation costs $29.99 up front. SEAiq sells 2 in-app purchases, starting at $15.00 per year. EZ Celestial Navigation asks for nothing beyond the download.

EZ Celestial Navigation holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: SEAiq has 193 ratings behind it against 26, so its average is the more settled of the two. Written reviews point the same way: 61% of SEAiq's written reviews are positive against 100% of EZ Celestial Navigation's.

SEAiq ships an update every 3 weeks, EZ Celestial Navigation monthly. The most recent releases landed on October 11, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | SEAiq | EZ Celestial Navigation |
| --- | --- | --- |
| Price | **Free** | $29.99 |
| Rating | [4.7 (193 ratings)](https://appshunter.io/ios/app/seaiq/id529514298/reviews) | **[4.9 (26 ratings)](https://appshunter.io/ios/app/ez-celestial-navigation/id1547239240/reviews)** |
| Number of ratings | **193** | 26 |
| Positive reviews | 61.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | — | **#72** |
| Size | 53 MB | 153 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sakhalin](https://appshunter.io/developer/517213477) | [EZ Celestial LLC](https://appshunter.io/developer/504153123) |

## What reviewers say

### SEAiq

[App page](https://appshunter.io/ios/app/seaiq/id529514298)

This marine navigation app offers comprehensive charting capabilities, allowing users to load various standard chart formats and download NOAA charts. It includes essential navigation tools like waypoints, routes, and an anchor alarm, along with weather overlays and NMEA/AIS integration.

**Highlights:** Load custom S-57, S-63, iENC, BSB, KAP charts, Automatic NOAA chart downloads, Waypoints, routes, and tracks, Anchor alarm, Automatic weather downloads, NMEA and AIS integration

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Annual | $15.00 | per year |
| Upgrade for Premium Features | $49.99 | one-time |

**What reviewers like**

- 👍 Highly reliable navigation app
- 💡 Tons of features
- ✨ Clean and sensical interface
- 🚀 Versatile for plotting routes/waypoints
- 📊 Estimating AIS target crossing range

**What reviewers complain about**

- 😩 Tedious to plot a course
- 🔧 Complicated chart setup initially
- 🤔 Not user friendly
- 📚 Instructions not very helpful
- ⏳ Time wasted on simple things

**Reported bugs**

- No access to premium features after payment
- Chart downloads fail if app is not on screen
- App freezes when trying to delete
- App crashes

**Requested features**

- Simplify course plotting
- Add support for .MBTiles
- Add VMG feature
- Add support for .MBTiles
- Add support for .MBTiles


### EZ Celestial Navigation

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

**Currently charting:** #72 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 SEAiq free?

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

### Is EZ Celestial Navigation free?

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

### Which has better reviews, SEAiq or EZ Celestial Navigation?

EZ Celestial Navigation is rated higher. SEAiq averages 4.7 out of 5 from 193 ratings, while EZ Celestial Navigation averages 4.9 from 26 ratings.

### Do SEAiq or EZ Celestial Navigation have ads?

Neither SEAiq nor EZ Celestial Navigation shows ads.

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

SEAiq ships an update every 3 weeks, and EZ Celestial Navigation monthly. Most recently, SEAiq was updated on October 11, 2026 and EZ Celestial Navigation on October 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.*