# SCATalogue vs AQS

The clearest difference is update cadence: AQS at every 5 weeks against SCATalogue's every 6 months. SCATalogue's advantage is iOS requirement (12.4 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

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

SCATalogue ships an update every 6 months, AQS every 5 weeks. The most recent releases landed on October 15, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SCATalogue | AQS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/scatalogue/id1121801990/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 164 MB | 70 MB |
| Requires iOS | **12.4** | 16.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [California Department of Fish and Wildlife](https://appshunter.io/developer/952783582) | [Aquarius-Spectrum](https://appshunter.io/developer/1613033707) |

## What reviewers say

### SCATalogue

[App page](https://appshunter.io/ios/app/scatalogue/id1121801990)

This app streamlines the collection of shoreline oiling data during spill responses. It's designed for marine environments and uses NOAA's standard SCAT shoreline oiling summary form. Data can be easily transferred via email or other available methods.

**Highlights:** Shoreline cleanup assessment data collection, Supports NOAA standard SCAT form, Designed for marine spill response, Data transfer via email and other methods, JSON and geoJSON data output, Optimized for iPad use

**In-app purchases:** none


### AQS

[App page](https://appshunter.io/ios/app/aqs-sys-app/id1613033435)

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

**In-app purchases:** none


## Frequently asked questions

### Is SCATalogue free?

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

### Is AQS free?

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

### Do SCATalogue or AQS have ads?

Neither SCATalogue nor AQS shows ads.

### Which is updated more often, SCATalogue or AQS?

SCATalogue ships an update every 6 months, and AQS every 5 weeks. Most recently, SCATalogue was updated on October 15, 2026 and AQS on October 24, 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.*