Yara, a diesel exhaust fluid producer, launched a DEF locator mobile app that uses GPS technology to identify the DEF retail outlets closest to a driver's location.

The Air1 DEF Mobile Locator is currently available for free download in the iTunes app store for use on the iPhone, iTouch, and iPad. Yara also plans to release an Android and Windows 7 compatible version of the app at the beginning of August and September respectively.

Drivers who download the Air1 DEF Mobile Locator app will be able to locate the closest retail location is whenever they need to fill up or top off their tanks with DEF.

The app comes programmed with over 600 U.S. DEF outlets, and it is searchable by city, state and zip code. Using GPS, the app also calculates directions to a selected retailer.

To download the app for free, please visit the Air1 website or the iTunes app store.