Use of the app

Use of the app

Practical use of the app

Whether on the high seas or by the river at home, anyone can make a scientific contribution with the EyeOnWater app. Now some of you are probably wondering "How does it all work?". It's quite simple.

1. download the app.
It is free and can be used directly.


2. go to a body of water that you want to investigate.
It doesn't matter whether it's a river, lake or even the sea. The main thing is that it is not a puddle, as that would be too small.

3. open the app and tap on "GET STARTED".

4. take a photo of the water.
Hold your camera horizontally and try to have the sun behind you.

As long as you don't drop your mobile phone, you can't go far wrong.

5. indicate the colour of the water in the app.
You will receive a colour scale for comparison. The better your photo was, the easier it is to determine the colour.

6 Now just answer a few questions.
And you're done!

You have made a small but important contribution to ensuring balanced water quality. Good work!

You can also view other people's observations on the app's website.
If you want, you can also set up an account and receive points for every observation you make. But even without an account, your observations have a value for science. So why not give it a try!

(Changed: 11 Feb 2026)  Kurz-URL:Shortlink: https://uol.de/p83851en
Zum Seitananfang scrollen Scroll to the top of the page

This page contains automatically translated content.