Phyto vs EyeOnWater
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Phyto
Learn to identify common marine and freshwater phytoplankton with this educational app. It features a comprehensive identification guide, flashcards, and interactive games to aid learning. Developed with support from NOAA, it's designed for both iPhone and iPad.
- Phytoplankton identification guide
- Marine and freshwater species
- Flash cards for learning
- Interactive identification games
- Species details and photos
- Submit observation results
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Phyto helps you learn to identify phytoplankton and their proper pronunciation. It includes the most common marine and freshwater phytoplankton. --------------------- Phyto Version 2.0 - Completely redesigned! --------------------- - Many new species added with more details and photos. - Freshwater and Marine species now included - Flash Cards and Fast Phyto: two games to help learn how to identify phytoplankton - Species Identification Guide - Phytoplankton Monitoring Network volunteers can submit sample observation results - Embedded news and information browser - Universal App: now works well on both the iPhone and iPad (support for all screen sizes and resolutions) ----------------- This application was developed by the Phytoplankton Monitoring Network which is sponsored by the Center for Coastal Environmental Health and Biomolecular Research division of the U.S. National Oceanic and Atmospheric Administration (NOAA).
EyeOnWater
Contribute to scientific research by measuring and reporting the color of nearby bodies of water. Your data helps scientists track water quality and life within it over time, building on a long-standing scientific observation method.
- Measure water color
- Contribute to scientific research
- Track water quality
- Observe algae presence
- Utilize Forel-Ule scale
- View data on website
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The EyeOnWater concept consists of an App and a website. The app allows you as user to make a contribution to science and supply information about the water colour of fresh- as well as saline waters (lakes, rivers, coastal waters, seas and oceans) near your location or elsewhere. The measurement is sent to the central server, validated and stored, after which it is visible via the EyeOnWater website: www.eyeonwater.org What is it you measure? Water colour is an indication for life (e.g. algae) in the water. Scientists have been measuring this in marine waters via the Forel-Ule scale for more than 200 years. Your measurements will contribute to this long term observation and continue the timeseries. The EyeOnWater concept has been developed by NIOZ (scientific background), Veerder (Design), and MARIS (Technical development), with assistance from other partners in the EU funded project Citclops: www.citclops.eu Join us!
Screenshots
Verdict
The clearest difference is rating: Phyto at 4.8 against EyeOnWater's 2.5. Phyto also leads on ratings volume (6 vs 2). EyeOnWater's advantage is update cadence (every 2 months vs every 10 months). On price, ads, in-app purchases and monetization model 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.
Phyto holds the better App Store score, 4.8 against 2.5. Both are backed by a comparable volume of ratings — 6 and 2 respectively.
Phyto ships an update every 10 months, EyeOnWater every 2 months. The most recent releases landed on October 31, 2026 and November 1, 2026 respectively.
| Parameter | Phyto | EyeOnWater |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (6 ratings) — better | 2.5 (2 ratings) |
| Positive reviews | 64.3% of reviews | — |
| Number of ratings | 6 — better | 2 |
| Update frequency | Every 10 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 81 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | Gano Technologies LLC | MARIS B.V. |
Customer experience
Phyto
EyeOnWater
In-app purchases
Phyto
No in-app purchases
EyeOnWater
No in-app purchases
Questions
Is Phyto free?
Is EyeOnWater free?
Which has better reviews, Phyto or EyeOnWater?
Do Phyto or EyeOnWater have ads?
Which is updated more often, Phyto or EyeOnWater?
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