CitSci vs Gaiaxus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CitSci
Empower your community with a tool for collecting and uploading scientific observations. This app facilitates citizen science projects, allowing users to contribute valuable data directly to a central platform.
- Data collection for citizen science
- Upload observations to CitSci.org
- Empowers community science projects
- Syncs with web platform
- Facilitates observation contribution
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The CitSci mobile app is a data collection app for citizen scientists that syncs up with CitSci.org. The app augments the web site by empowering users to collect and upload observations to CitSci.org. The app helps people and communities do great citizen science.
Gaiaxus
This app enables users to monitor water quality using a connected sensor, collecting data on temperature, turbidity, salinity, and more. It offers interactive learning modules for environmental education, suitable for students and citizen scientists.
- Real-time water quality data collection
- Temperature, turbidity, salinity, pH, chlorophyll monitoring
- Interactive educator-designed learning modules
- Field data collection and viewing
- Supports K-12 students, citizen scientists, and researchers
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The GaiaXus mobile app is a powerful tool for water quality monitoring, designed to engage students and citizen scientists in hands-on environmental education. Paired with the Proteus sensor, the app captures key water quality data like temperature, turbidity, salinity, depth, chlorophyll, and pH, providing a user-friendly platform for field data collection, viewing, and interactive learning through educator-designed “Labs.” While tailored for K-12 students, the app also scales for citizen scientists and researchers, enriching environmental literacy and STEM skills by combining real-world data with collaborative, problem-solving activities.
Screenshots
Verdict
The clearest difference is rating: Gaiaxus at 5.0 against CitSci's 4.5. On price, ratings volume, update cadence and ads 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Gaiaxus holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
CitSci ships an update every 6 weeks, Gaiaxus every 2 months. The most recent releases landed on October 23, 2026 and October 11, 2026 respectively.
| Parameter | CitSci | Gaiaxus |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (2 ratings) | 5.0 (1 ratings) — better |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 6 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 33 MB | 75 MB |
| Age rating | 4+ | 4+ |
| Developer | Greg Newman | GaiaXus LLC |
Customer experience
CitSci
Gaiaxus
In-app purchases
CitSci
No in-app purchases
Gaiaxus
No in-app purchases
