# SEAiq vs NMEA GPS Tether

The clearest difference is review sentiment: SEAiq at 61% against NMEA GPS Tether's 25%. SEAiq also leads on ratings volume (194 vs 1) and update cadence (every 2 weeks vs every 2 months). NMEA GPS Tether's advantage is rating (5.0 vs 4.7). 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 NMEA GPS Tether sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

NMEA GPS Tether holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: SEAiq has 194 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 61% of SEAiq's written reviews are positive against 25% of NMEA GPS Tether's, so the app with the better star average is not the one people write more warmly about.

SEAiq ships an update every 2 weeks, NMEA GPS Tether every 2 months. The most recent releases landed on November 6, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | SEAiq | NMEA GPS Tether |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (194 ratings)](https://appshunter.io/ios/app/seaiq/id529514298/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/nmea-gps-tether/id710578894/reviews)** |
| Number of ratings | **194** | 1 |
| Positive reviews | **61.3% of reviews** | 25.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 54 MB | 39 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sakhalin](https://appshunter.io/developer/517213477) | [Lee Kien Yeong](https://appshunter.io/developer/710578897) |

## What reviewers say

### SEAiq

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

This marine navigation app offers comprehensive charting tools, allowing users to load various chart formats and automatically download NOAA charts for the US. It includes features like waypoints, routes, tracks, weather overlays, and NMEA/AIS integration for enhanced seafaring.

**Highlights:** Load custom charts (S-57, S-63, BSB, KAP), Automatic NOAA chart downloads (US), Waypoint and route planning, Track recording and display, Night color modes, Anchor alarm, Weather overlays (wind & isobar), 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


### NMEA GPS Tether

[App page](https://appshunter.io/ios/app/nmea-gps-tether/id710578894)

Share GPS data from another device to your iPad over WiFi. Ideal for devices lacking built-in GPS, allowing you to view location information on a map. Offers customizable runtime and update frequency.

**Highlights:** Receive GPS data from other devices, View location on map, Customizable runtime, Adjust map update frequency, Auto-center map with history trail

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Purchase Full Version | $3.99 | one-time |


## Frequently asked questions

### Is SEAiq free?

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

### Is NMEA GPS Tether free?

NMEA GPS Tether is free to download, with in-app purchases available.

### Which has better reviews, SEAiq or NMEA GPS Tether?

NMEA GPS Tether is rated higher. SEAiq averages 4.7 out of 5 from 194 ratings, while NMEA GPS Tether averages 5.0 from 1 ratings.

### Do SEAiq or NMEA GPS Tether have ads?

Neither SEAiq nor NMEA GPS Tether shows ads.

### Which is updated more often, SEAiq or NMEA GPS Tether?

SEAiq ships an update every 2 weeks, and NMEA GPS Tether every 2 months. Most recently, SEAiq was updated on November 6, 2026 and NMEA GPS Tether on November 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.*