# Fishes vs ACTT

The clearest difference is update cadence: ACTT at every 8 months against Fishes's every 45 months. Fishes's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Fishes ships an update every 45 months, ACTT every 8 months. The most recent releases landed on November 1, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Fishes | ACTT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (14 ratings)](https://appshunter.io/ios/app/fishes-greater-caribbean/id570048678/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 84.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 45 months | **Every 8 months** |
| Monetization | Free | — |
| Size | 817 MB | 61 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Smithsonian Institution](https://appshunter.io/developer/370564865) | [University of South Carolina](https://appshunter.io/developer/694863391) |

## What reviewers say

### Fishes

[App page](https://appshunter.io/ios/app/fishes-greater-caribbean/id570048678)

An offline identification guide for Caribbean shore-fish. It features detailed species descriptions, over 8,200 images, and a search engine to identify fish by various characteristics. Users can also create and export observation lists.

**Highlights:** Offline identification guide, 1,693 species covered, Over 8,200 images, Detailed species descriptions, Search engine for identification, Customizable observation lists, English and Spanish interfaces

**Features:** Vision Pro support

**In-app purchases:** none


### ACTT

[App page](https://appshunter.io/ios/app/actt-study/id6744712322)

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

**In-app purchases:** none


## Frequently asked questions

### Is Fishes free?

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

### Is ACTT free?

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

### Do Fishes or ACTT have ads?

Neither Fishes nor ACTT shows ads.

### Which is updated more often, Fishes or ACTT?

Fishes ships an update every 45 months, and ACTT every 8 months. Most recently, Fishes was updated on November 1, 2026 and ACTT on November 8, 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.*