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 1.40

Removed the background modes - Minor Release - Updated App Store screenshots and gallery images. Tomorrow is Earth day! Happy Earth Day from GeoMarvel and the Earth Day Network!

Ratings and Reviews

4.6 out of 5
28 Ratings

28 Ratings

nico patel ,

I feel like a scientist

This app makes me feel like I’m really helping save the world bit by bit. It’s better to do something than nothing

Eclipse P. ,

I’d love to use it and it looks great but...

Every time I hit ‘join’ it crashes! Anyone help?

marchandw ,

Stuck in “downloading ”

Both my son & I have the same problem. The plastic pollution & air quality page say downloading over each image & doesn't allow you to do anything. If you click start for either of those categories, it goes to a complete orange screen you can’t get out of. Very frustrating.


Earth Day Network Inc.
157.7 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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