# WaterQuality vs MAP AIS Field Guide

The clearest difference is price: MAP AIS Field Guide at Free against WaterQuality's $4.99. WaterQuality's advantage is chart position (#194 vs unranked) and iOS requirement (11.0 vs 14.0). On ads, in-app purchases and device support there is nothing between them.

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

## The numbers

| Metric | WaterQuality | MAP AIS Field Guide |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/waterquality/id569193509/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | — |
| Monetization | Paid | — |
| Best chart rank | **#194** | — |
| Size | 96 MB | 11 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Stroud Water Research Center, Inc.](https://appshunter.io/developer/1200990268) | [Skyward App Company](https://appshunter.io/developer/821096887) |

## What reviewers say

### WaterQuality

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

**Currently charting:** #194 Top Paid · Education (US App Store)

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

**In-app purchases:** none


### MAP AIS Field Guide

[App page](https://appshunter.io/ios/app/map-ais-field-guide/id6757203511)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is WaterQuality free?

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

### Is MAP AIS Field Guide free?

MAP AIS Field Guide is free to download, with no in-app purchases.

### Do WaterQuality or MAP AIS Field Guide have ads?

Neither WaterQuality nor MAP AIS Field Guide shows ads.

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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.*