# RT vs SeaSat

The clearest difference is rating: RT at 3.0 against SeaSat's 1.0. RT also leads on update cadence (monthly vs every 8 months) and chart position (#168 vs unranked). SeaSat's advantage is in-app purchases (none vs 5) and iOS requirement (8.0 vs 26.0). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. RT sells 5 one-off in-app purchases. SeaSat asks for nothing beyond the download.

RT holds the better App Store score, 3.0 against 1.0. Both are backed by a comparable volume of ratings — 8 and 2 respectively. Written reviews split almost evenly too, at 0% and 0% positive.

RT ships an update monthly, SeaSat every 8 months. The most recent releases landed on October 9, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | RT | SeaSat |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (8 ratings)](https://appshunter.io/ios/app/rt-nav/id586307815/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/seasat/id932441902/reviews) |
| Number of ratings | **8** | 2 |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 8 months |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#168** | — |
| Size | 13 MB | 18 MB |
| Requires iOS | 26.0 | **8.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hilton's Fishing Charts, L.L.C.](https://appshunter.io/developer/586307818) | [Proambiente SCRL](https://appshunter.io/developer/932441901) |

## What reviewers say

### RT

[App page](https://appshunter.io/ios/app/rt-nav/id586307815)

**Currently charting:** #168 Top Grossing · Navigation (US App Store)

Navigate using real-time oceanographic data like sea surface temperatures and currents on your mobile device. Create and edit waypoints, zoom maps, and track your GPS location for point-to-point navigation. Access dynamic maps even without cell service.

**Highlights:** Real-time oceanographic imagery, Waypoint creation and editing, Map zooming, Point-to-point navigation, Real-time GPS tracking, Offline navigation capabilities

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Day Subscription | $29.99 | one-time |
| 1 Week Subscription | $49.99 | one-time |
| 1 Month Subscription | $99.99 | one-time |
| 1 Year Subscription | $199.99 | one-time |
| One Year International | $199.99 | one-time |


### SeaSat

[App page](https://appshunter.io/ios/app/seasat/id932441902)

Access near real-time data on Sea Surface Temperature, water transparency, and chlorophyll concentration directly on your smartphone. This application provides essential environmental information for users interested in marine conditions.

**Highlights:** Sea Surface Temperature data, Water transparency information, Chlorophyll concentration readings, Near real-time updates, Smartphone accessibility

**In-app purchases:** none


## Frequently asked questions

### Is RT free?

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

### Is SeaSat free?

SeaSat is free to download, with no in-app purchases.

### Which has better reviews, RT or SeaSat?

RT is rated higher. RT averages 3.0 out of 5 from 8 ratings, while SeaSat averages 1.0 from 2 ratings.

### Do RT or SeaSat have ads?

Neither RT nor SeaSat shows ads.

### Which is updated more often, RT or SeaSat?

RT ships an update monthly, and SeaSat every 8 months. Most recently, RT was updated on October 9, 2026 and SeaSat on September 25, 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.*