App developer Chimani Inc. has launched a free mobile app to guide visitors through all 59 national parks in the U.S. to celebrate the centennial of the National Park Service.

The announcement was made Tuesday, in conjunction with Subaru of America, which is funding a marketing campaign for the launch.

Subaru has partnered with Portland-based Chimani for three years to help educate visitors on the importance of reducing waste in national parks by using a mobile app rather than a paper guide, according to a news release from Chimani.

The apps offer hiking trails, points of interest, park facilities and other information along with GPS-enabled maps that work without a cell or WiFi connection.

Each of the 59 national park apps and the flagship National Parks app are available for free download in the App Store, Google Play and Amazon Appstore.

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