# Terrafin Mobile vs Catalysst SoCal

The clearest difference is chart position: Terrafin Mobile at #77 against Catalysst SoCal's unranked. On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Terrafin Mobile sells 1 one-off in-app purchase and Catalysst SoCal sells 1 in-app purchase, starting at $17.99 per month. 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 Catalysst SoCal. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Terrafin Mobile ships an update every 6 weeks, Catalysst SoCal every 2 months. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Terrafin Mobile | Catalysst SoCal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/terrafin-mobile/id585725567/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/catalysst-socal/id6789408870/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 36.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Subscription | Subscription |
| Best chart rank | **#77** | — |
| Size | 47 MB | 8 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Terrafin Satellite Imaging](https://appshunter.io/developer/585725770) | [Chasing Pelagics LLC](https://appshunter.io/developer/6775708441) |

## What reviewers say

### Terrafin Mobile

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

**Currently charting:** #77 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 |


### Catalysst SoCal

[App page](https://appshunter.io/ios/app/catalysst-socal/id6789408870)

Access real-time fishing intelligence for Southern California's offshore waters. View live fleet tracking, satellite maps, catch reports, and GPS fishing spots. A subscription unlocks full access with a free trial.

**Highlights:** Live fishing-fleet tracking (AIS), Sea-surface temperature & chlorophyll maps, Captain and fleet catch reports, GPS fishing spots, Offshore-ready map

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SoCal Fishing Intelligence | $17.99 | per month |


## Frequently asked questions

### Is Terrafin Mobile free?

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

### Is Catalysst SoCal free?

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

### Which has better reviews, Terrafin Mobile or Catalysst SoCal?

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

### Do Terrafin Mobile or Catalysst SoCal have ads?

Neither Terrafin Mobile nor Catalysst SoCal shows ads.

### Which is updated more often, Terrafin Mobile or Catalysst SoCal?

Terrafin Mobile ships an update every 6 weeks, and Catalysst SoCal every 2 months. Most recently, Terrafin Mobile was updated on November 1, 2026 and Catalysst SoCal on November 5, 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.*