We have been talking about National Park Week here at Gadling recently, offering information about free admission during the week, Nat Geo bringing national park maps to iPhone and iPad and even a story about a photographer who visited all the parks and lived to tell about it. Today, we have a couple other apps for you to add to your collection.

Chimani, LLC announced today that all iPhone national park apps will be free during National Park Week, April 16-24.

The Chimani suite of national park apps include Acadia National Park, Cape Cod National Seashore, Cuyahoga Valley National Park, Grand Canyon National Park and Yosemite National Park.

"Entrance to the national parks is free, and so too should our apps", says Chimani President, Kerry Gallivan. "Chimani develops apps for national parks because they are special - and we want to encourage as many people as possible to get out and enjoy them."

The Android versions of each national park app will be available for only $.99 cents. The Chimani national park apps normally sell for between $4.99-$9.99 each.

The National Parks Conservation Association also has a free iPhone app called the National Parks Field Guide that looks to be extensive. We featured this one last October which includes includes bird portraits, call recordings, information about endangered and poisonous species, range maps, and wildlife. Users will also find current news about each park, access and visitor information, and directions to park visitor centers.

Flickr photo by Alaskan Dude