About
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.
What's New in EyeOnWater
2.6.5
May 20, 2026
Minor bugfixes and improvements
Developer apps
FAQ
What is EyeOnWater used for?
EyeOnWater is a citizen science app that allows users to measure and report the color of fresh and saline waters. This data contributes to long-term scientific observation of water quality and the presence of life like algae.
How does EyeOnWater help science?
By measuring water color using the Forel-Ule scale, users contribute to a continuous timeseries of data that scientists have been collecting for over 200 years. This helps track changes in marine and freshwater ecosystems.
What devices does EyeOnWater support?
EyeOnWater is available for iPhone, iPad, and iPod devices, making it accessible to a wide range of Apple users interested in contributing to environmental research.
Is EyeOnWater free to use?
Yes, EyeOnWater is completely free to download and use. There are no in-app purchases or subscription fees required to contribute your water color measurements.
What is the age rating for EyeOnWater?
EyeOnWater has an age rating of 4+, making it suitable for children and adults alike to participate in citizen science and learn about water environments.
How often is EyeOnWater updated?
The latest version of EyeOnWater is 2.6.5, and it was last updated on May 20, 2026. This indicates a commitment to maintaining and improving the application.
Where can I see the data collected by EyeOnWater?
All measurements submitted through the EyeOnWater app are sent to a central server, validated, and stored. This data then becomes visible on the official EyeOnWater website: www.eyeonwater.org.
Does EyeOnWater have ads?
No, EyeOnWater does not contain advertisements. The app is designed to provide a seamless experience for users focused on contributing to scientific data collection.
