# WaterQuality vs EDC Hub

The clearest difference is price: EDC Hub at Free against WaterQuality's $4.99. WaterQuality's advantage is iOS requirement (11.0 vs 13.0). On rating, ratings volume, update cadence and ads there is nothing between them.

EDC Hub is free to download; WaterQuality costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for WaterQuality against 5.0 for EDC Hub. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Both ship on a similar rhythm, roughly every 5 months. The most recent releases landed on October 29, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | WaterQuality | EDC Hub |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/waterquality/id569193509/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/edc-hub/id1638024441/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | Every 5 months |
| Monetization | Paid | **Free** |
| Size | 96 MB | 26 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Stroud Water Research Center](https://appshunter.io/developer/1200990268) | [Inquiring Systems, Inc](https://appshunter.io/developer/1686315291) |

## What reviewers say

### WaterQuality

[App page](https://appshunter.io/ios/app/waterquality/id569193509)

This educational app allows users of all ages to record stream study data and learn about water quality indicators. It functions offline and includes a field guide for identifying aquatic macroinvertebrates to assess pollution tolerance. Data can be exported for scientific research or educational purposes.

**Highlights:** Record stream study data, Learn about water quality indicators, Offline functionality, Macroinvertebrate field guide, Data export (print/email), Site location recording

**Features:** Vision Pro support

**In-app purchases:** none


### EDC Hub

[App page](https://appshunter.io/ios/app/edc-hub/id1638024441)

Connect with a global community of researchers, designers, and activists focused on ecological futures. Share ideas, resources, and images, join or create interest groups, and participate in collaborative projects. The app facilitates discussions and showcases innovative ecological design.

**Highlights:** Share news, resources, and ideas, Connect with community members, Join or create interest groups, Participate in collective events, Discussion forums, Collaborative work tools

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

**In-app purchases:** none


## Frequently asked questions

### Is WaterQuality free?

WaterQuality costs $4.99, with no in-app purchases.

### Is EDC Hub free?

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

### Which has better reviews, WaterQuality or EDC Hub?

WaterQuality and EDC Hub are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do WaterQuality or EDC Hub have ads?

Neither WaterQuality nor EDC Hub shows ads.

### Which is updated more often, WaterQuality or EDC Hub?

WaterQuality ships an update every 5 months, and EDC Hub every 5 months. Most recently, WaterQuality was updated on October 29, 2026 and EDC Hub on October 13, 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.*