# iNavX vs SeaNav US

The clearest difference is price: iNavX at Free against SeaNav US's $19.99. iNavX also leads on rating (4.8 vs 4.3) and ratings volume (22K vs 100). SeaNav US's advantage is ads (none vs shown). On review sentiment, in-app purchases, monetization model and device support there is nothing between them.

iNavX is free to download; SeaNav US costs $19.99 up front. iNavX sells 11 in-app purchases, starting at $9.99 per month and SeaNav US sells 7 in-app purchases, starting at $7.49 per year. Whichever you choose, the download price is not the number that matters.

iNavX holds the better App Store score, 4.8 against 4.3. That said, the two scores are not equally well evidenced: iNavX has 22K ratings behind it against 100, so its average is the more settled of the two. Written reviews complicate that: 44% of iNavX's written reviews are positive against 48% of SeaNav US's, so the app with the better star average is not the one people write more warmly about.

iNavX ships an update every 5 weeks, SeaNav US every 4 months. The most recent releases landed on October 21, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | iNavX | SeaNav US |
| --- | --- | --- |
| Price | **Free** | $19.99 |
| Rating | **[4.8 (22K ratings)](https://appshunter.io/ios/app/inavx-marine-navigation/id286616280/reviews)** | [4.3 (100 ratings)](https://appshunter.io/ios/app/seanav-us/id632635827/reviews) |
| Number of ratings | **22K** | 100 |
| Positive reviews | 43.8% of reviews | **48.5% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 5 weeks** | Every 4 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#123** | — |
| Size | 298 MB | 76 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [NavX Studios LLC](https://appshunter.io/developer/286616283) | [Pocket Mariner Ltd.](https://appshunter.io/developer/719592131) |

## What reviewers say

### iNavX

[App page](https://appshunter.io/ios/app/inavx-marine-navigation/id286616280)

**Currently charting:** #123 Top Grossing · Navigation (US App Store)

This app provides comprehensive marine navigation tools, including worldwide chart coverage, weather forecasts, and AIS integration. It allows users to plan routes, track their position, and connect with onboard instruments for a complete boating experience.

**Highlights:** Worldwide marine chart access, Real-time GPS plotting, Waypoint and route management, GRIB weather forecasts, AIS integration, Nautical instrument connectivity

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

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Theyr Premium - Mobile (Monthly) for iOS | $9.99 | per month |
| iNavX Professional+ USA | $29.99 | per year |
| Navionics+ USA/Canada (iPhone) | $29.99 | per year |
| Navionics+ Caribbean (iPhone) | $44.99 | per year |
| Theyr Premium Weather | $49.99 | per year |
| iNavX Professional+ USA Canada | $59.99 | per year |
| C-MAP World Chart | $59.99 | per year |
| Explorer Chartbooks - Bahamas | $69.99 | per year |
| Navionics+ USA/Canada (iPad) | $79.99 | per year |
| Navionics+ Caribbean (iPad) | $79.99 | per year |
| AIS Live | $99.99 | per year |

**What reviewers like**

- 🚀 Accurate and precise navigation
- 📊 Comprehensive charting and navigation features
- 🛠️ Customizable instrument settings
- 🔄 Redundancy across devices
- 💨 Reliable performance over many years

**What reviewers complain about**

- 🤔 Clunky and unintuitive user interface
- 🗺️ Cumbersome chart management and downloading
- 🔋 Battery drain issues
- 💰 Expensive subscription model for charts
- 🐛 Stability issues and crashes

**Reported bugs**

- Inability to remove waypoints
- Inconsistent behavior when transitioning International Date Line
- Disappearing or missing chart data

**Requested features**

- Seamless chart switching and panning
- Integrated tidal and current data
- Support for more chart types and providers
- Improved route planning and editing tools
- Automatic chart updates and management


### SeaNav US

[App page](https://appshunter.io/ios/app/seanav-us/id632635827)

Navigate boating trips with high-resolution NOAA marine charts for the USA and Great Lakes. Features include live AIS, augmented reality views, route planning, and offline chart access. Integrates with ActiveCaptain and external devices.

**Highlights:** High-resolution NOAA marine charts, Live AIS ship targets and collision alerts, Augmented Reality camera view, Route planning and tracking, Offline charts, ActiveCaptain integration

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weather charts | $7.49 | per year |
| NOAA US Raster charts | $9.99 | per year |
| Bermuda and BVI Charts | $12.99 | per year |
| UK Charts | $13.99 | per year |
| US Chart Updates | $19.99 | per year |
| Canada Charts | $29.99 | per year |
| Man Overboard & Anchor Watch | $4.99 | one-time |


## Frequently asked questions

### Is iNavX free?

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

### Is SeaNav US free?

SeaNav US costs $19.99, and also offers in-app purchases.

### Which has better reviews, iNavX or SeaNav US?

iNavX is rated higher. iNavX averages 4.8 out of 5 from 22K ratings, while SeaNav US averages 4.3 from 100 ratings.

### Do iNavX or SeaNav US have ads?

iNavX shows ads; SeaNav US does not.

### Which is updated more often, iNavX or SeaNav US?

iNavX ships an update every 5 weeks, and SeaNav US every 4 months. Most recently, iNavX was updated on October 21, 2026 and SeaNav US on October 20, 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.*