Earth Challenge makes it easy for everyone to monitor the environment! Capture research quality environmental data for scientists working to better understand and protect nature. The Earth Challenge app not only lets you engage in citizen science to record the environment around you, but it also provides you with the tools to help protect it.

- Discover and learn about different environmental issues in your area -- including air quality, insect populations, and plastic pollution
- Record your own observations and share them with the community
- Compare your observations to other citizen scientists using interactive maps
- Get access to specialized environmental lesson plans and guided activities
- Receive tailored suggestions for how to take environmental action and improve your community

Earth Challenge is a joint initiative by Earth Day Network, the Wilson Center and the US Department of State.

For more info visit

What’s New

Version 1.5.20

- Haptic feedback on buttons
- Pinch-to-zoom on images
- Updated user interface and loading screen
- New design and navigation bar
- Updated charting component
- New framework design
- Design forward cropped imagery
- Take action educational material and lesson plans
- Updated training instructions

Ratings and Reviews

4.8 out of 5
16 Ratings

16 Ratings

KaikoMeloche ,

Important work and easy to use!

I’m able to contribute on science projects that help scientists around the world. I’m learning a ton and the app is super easy to use!

kathturn ,

Great app for a great cause!

I feel like I’m doing something useful. The app makes it so easy. This is such important work that needs to be done!

F_W_P ,

Simple way to make a difference

App is easy to use and helps collect data to monitor the changing climate


Earth Day Network Inc.
139.7 MB

Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.

Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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