Want an easy way to raise money for your favorite animal shelter? There’s an app for that. Walk For A Dog is an app you can download to your phone that keeps track of how far you’ve walked and donates to any animal shelter based on that distance. Jillian Urbach and Wilson Loucks, juniors at Friday Harbor High School, have made it their mission to spread the word about the free app as part of their community project.

“It’s a great tool,” says Loucks. “You’re walking your dog anyway. If you can make money for a good cause at the same time, why not?”

The app, developed by WoofTrax, Inc., allows users to select any shelter or rescue organization as their beneficiary, but, of course, Loucks and Urbach hope locals will choose the Animal Protection Society -Friday Harbor. “We’ve gotten all our pets from the animal shelter,” Urbach says. “I wanted to find a way to give back.”

In addition to promoting the app, the teens have built nine scratching posts for the cats at the shelter.

They also raised $200 by hosting a DIY dog wash at the shelter.