# SEAiq vs NavLink HD

The clearest difference is review sentiment: SEAiq at 61% against NavLink HD's 0%. SEAiq also leads on rating (4.7 vs 4.2) and update cadence (every 3 weeks vs every 5 months). NavLink HD's advantage is iOS requirement (11.0 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. SEAiq sells 2 in-app purchases, starting at $15.00 per year and NavLink HD sells 11 in-app purchases, starting at $8.49 per year. Whichever you choose, the download price is not the number that matters.

SEAiq holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: SEAiq has 194 ratings behind it against 11, 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 0% of NavLink HD's.

SEAiq ships an update every 3 weeks, NavLink HD every 5 months. Both last shipped on October 29, 2026.

## The numbers

| Metric | SEAiq | NavLink HD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (194 ratings)](https://appshunter.io/ios/app/seaiq/id529514298/reviews)** | [4.2 (11 ratings)](https://appshunter.io/ios/app/navlink-hd/id1183848518/reviews) |
| Number of ratings | **194** | 11 |
| Positive reviews | **61.3% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 54 MB | 52 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sakhalin](https://appshunter.io/developer/517213477) | [DigitalYacht Ltd.](https://appshunter.io/developer/394667310) |

## 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


### NavLink HD

[App page](https://appshunter.io/ios/app/navlink-hd/id1183848518)

Transform your Apple device into a comprehensive chart plotter for marine navigation. Access real-time GPS, AIS overlays, and route planning tools. Unlock advanced features like live internet AIS feeds and augmented reality through in-app purchases.

**Highlights:** Real-time GPS plotting, Live AIS ship overlay, Waypoint and route planning, NMEA instrument gauges, Augmented Reality HorizonView, S57 digital mapping

**Features:** macOS Compatibility

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weather charts | $8.49 | per year |
| Pro Features | $16.49 | per year |
| German Charts | $16.99 | per year |
| NL & BE Charts | $17.99 | per year |
| US & Great Lakes | $19.99 | per year |
| Portuguese charts | $19.99 | per year |
| French Charts | $22.99 | per year |
| Spanish Charts | $24.99 | per year |
| Croatia charts | $28.99 | per year |
| Canadian Charts | $30.99 | per year |
| Danish Charts | $36.99 | per year |


## Frequently asked questions

### Is SEAiq free?

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

### Is NavLink HD free?

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

### Which has better reviews, SEAiq or NavLink HD?

SEAiq is rated higher. SEAiq averages 4.7 out of 5 from 194 ratings, while NavLink HD averages 4.2 from 11 ratings.

### Do SEAiq or NavLink HD have ads?

Neither SEAiq nor NavLink HD shows ads.

### Which is updated more often, SEAiq or NavLink HD?

SEAiq ships an update every 3 weeks, and NavLink HD every 5 months. Most recently, SEAiq was updated on October 29, 2026 and NavLink HD on October 29, 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.*