WaterQuality vs FOTJ
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
WaterQuality
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.
- Record stream study data
- Learn about water quality indicators
- Offline functionality
- Macroinvertebrate field guide
- Data export (print/email)
- Site location recording
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The Water Quality Mobile App is designed for education or scientific research purposes. There are NO annoying advertisements. Users of all ages can record stream study data and learn about water quality indicators in learning pop-ups. Data can be recorded in a general or a Leaf Pack Network report. Stream study parameters include site location (lat. & long.), site profile information, water chemistries, physical stream data, aquatic macroinvertebrates, and much more! The macroinvertebrates section acts as a field guide of all of the major taxa used to calculate a pollution tolerance index. Pictures, sketches, short videos, and descriptions for identification are included for twenty-two macroinvertebrates. This app can be used in the field without WiFi or cell service. Once back to a WiFi or cell service area data can be exported as printed reports or emailed.
FOTJ
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Parameterizing field experiences to allow data-driven inputs to group belonging, participation, and teamwork.
Screenshots
Verdict
The clearest difference is price: FOTJ at Free against WaterQuality's $4.99. FOTJ also leads on update cadence (every 4 days vs every 5 months). WaterQuality's advantage is chart position (#197 vs unranked) and iOS requirement (11.0 vs 17.4). On ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
FOTJ is free to download; WaterQuality costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
WaterQuality ships an update every 5 months, FOTJ every 4 days. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.
| Parameter | WaterQuality | FOTJ |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 5 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Best chart rank | #197 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 11.0 — better | 17.4 |
| Further details — not scored | ||
| Size | 96 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Stroud Water Research Center | Rodney Dyer |
In-app purchases
WaterQuality
No in-app purchases
FOTJ
No in-app purchases
