Saving water on the go? Now there’s an app for that. Sloan's new Save H2O calculator is a free application for the iPhone that allows users to determine water usage and potential savings.

This new iApp allows facilities managers, designers, architects, engineers, plumbers and other professionals to immediately estimate current water usage and determine savings that could be gained by switching to water-efficient plumbing products. "Water is the most precious resource we have, and the iApp is a way of educating others on how they can help reduce their environmental impact while saving money," said Tim Schiffbauer, director of marketing for Sloan.

To calculate water usage and savings, the Sloan iApp asks users to input information, such as the type and quantity of toilets and urinals currently in place, the number of people who use the restrooms and local water rates. The iApp then displays photos and specifications for a variety of Sloan water-efficient plumbing products. Save H20 displays its calculations and allows users to alter variables for different results.

A more basic version of the water savings calculator is also accessible on the Sloan website.