# Terrafin Mobile vs SaltWx

Terrafin Mobile and SaltWx both sit at 5.0 stars, but that hides the real split: 100% of SaltWx's written reviews are positive against 36% of Terrafin Mobile's. SaltWx also leads on monetization model (free with in-app purchases vs subscription) and ratings volume (4 vs 1). Terrafin Mobile's advantage is ads (none vs shown) and update cadence (every 6 weeks vs every 11 months). On price, rating, in-app purchases and device support there is nothing between them.

Both are free to download. Terrafin Mobile sells 1 one-off in-app purchase and SaltWx sells 5 in-app purchases, starting at $39.99 per year. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Terrafin Mobile against 5.0 for SaltWx. Both are backed by a comparable volume of ratings — 1 and 4 respectively. Written reviews are what separate them: 36% of Terrafin Mobile's written reviews are positive against 100% of SaltWx's.

Terrafin Mobile ships an update every 6 weeks, SaltWx every 11 months. The most recent releases landed on October 3, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Terrafin Mobile | SaltWx |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/terrafin-mobile/id585725567/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/saltwx/id1521897621/reviews) |
| Number of ratings | 1 | **4** |
| Positive reviews | 36.4% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 6 weeks** | Every 11 months |
| Monetization | Subscription | **Free with in-app purchases** |
| Best chart rank | **#159** | — |
| Size | 47 MB | 49 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Terrafin Satellite Imaging](https://appshunter.io/developer/585725770) | [Piedmont Solutions, LLC](https://appshunter.io/developer/1521897623) |

## What reviewers say

### Terrafin Mobile

[App page](https://appshunter.io/ios/app/terrafin-mobile/id585725567)

**Currently charting:** #159 Top Grossing · Weather (US App Store)

Access detailed marine data, including sea surface temperature, chlorophyll, and currents, for fishing, diving, and research. Download charts for offline use and track your vessel's location in real-time.

**Highlights:** Offline chart downloads, Real-time vessel tracking, Latitude/Longitude/Temperature readings, Mark waypoints, Distance & Bearing calculations, Sea Surface Temperature charts, Chlorophyll/Ocean Color charts

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Terrafin Membership 12 Months | $119.00 | one-time |


### SaltWx

[App page](https://appshunter.io/ios/app/saltwx/id1521897621)

This marine forecast app offers side-by-side comparisons of four leading weather models for enhanced accuracy. It provides hourly forecasts up to six days out, including ocean conditions like tides and sea surface temperature, along with trip planning tools.

**Highlights:** Four weather models side-by-side, Hourly forecasts up to 6 days, Ocean conditions (tides, SST, chlorophyll), Proprietary clutter-free basemap, Satellite overlays (SST, Chlorophyll, Currents), Trip planning tools (waypoints, distance measure)

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly Subscriptions | $39.99 | per year |
| Start 1 Year Subscription | $39.99 | per year |
| Start 1 Year Subscription | $42.49 | per year |
| Yearly Subscription | $39.99 | one-time |
| Yearly Subscription | $42.49 | one-time |


## Frequently asked questions

### Is Terrafin Mobile free?

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

### Is SaltWx free?

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

### Which has better reviews, Terrafin Mobile or SaltWx?

Terrafin Mobile and SaltWx are both rated 5.0 out of 5 on the App Store, from 1 and 4 ratings respectively.

### Do Terrafin Mobile or SaltWx have ads?

SaltWx shows ads; Terrafin Mobile does not.

### Which is updated more often, Terrafin Mobile or SaltWx?

Terrafin Mobile ships an update every 6 weeks, and SaltWx every 11 months. Most recently, Terrafin Mobile was updated on October 3, 2026 and SaltWx on October 4, 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.*