# WWF SASSI vs SeafoodCheck

The clearest difference is update cadence: SeafoodCheck at every 2 months against WWF SASSI's every 7 months. SeafoodCheck also leads on iOS requirement (10.0 vs 13.4). 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.

WWF SASSI ships an update every 7 months, SeafoodCheck every 2 months. The most recent releases landed on September 26, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | WWF SASSI | SeafoodCheck |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (11 ratings)](https://appshunter.io/ios/app/seafoodcheck/id1078063422/reviews)** |
| Number of ratings | — | **11** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 40 MB | 37 MB |
| Requires iOS | 13.4 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Brand Foundry (Pty) Ltd](https://appshunter.io/developer/1003761740) | [Yaoyu Yang](https://appshunter.io/developer/1078063421) |

## What reviewers say

### WWF SASSI

[App page](https://appshunter.io/ios/app/wwf-sassi/id595444269)

**Features:** macOS Compatibility

**In-app purchases:** none


### SeafoodCheck

[App page](https://appshunter.io/ios/app/seafoodcheck/id1078063422)

This app provides a guide to mercury levels in seafood, drawing data from the FDA. It helps users identify fish with lower mercury content, offering advice for pregnant women, breastfeeding mothers, and young children. Easily check mercury levels and eating recommendations by typing in the name of any fish or seafood.

**Highlights:** Mercury level data from FDA, Eating guide based on mercury content, Searchable fish and seafood database, Recommendations for specific groups, User-friendly interface

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is WWF SASSI free?

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

### Is SeafoodCheck free?

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

### Do WWF SASSI or SeafoodCheck have ads?

Neither WWF SASSI nor SeafoodCheck shows ads.

### Which is updated more often, WWF SASSI or SeafoodCheck?

WWF SASSI ships an update every 7 months, and SeafoodCheck every 2 months. Most recently, WWF SASSI was updated on September 26, 2026 and SeafoodCheck on October 7, 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.*