The Browning V-Belt Efficiency Calculator, an application for the Apple iPhone, allows users to calculate projected energy savings when upgrading from a wrapped V-belt to a notched V-belt.

By entering usage data points, including geographic location, motor horsepower and days/hours per week, users of the app from St. Louis-based Emerson Industrial Automation, a business of Emerson, can calculate energy savings on-site. The application also has a payback calculation feature that gives users the ability to estimate the amount of their return on investment or days to payback.

The app can be downloaded to iPhones and iPod Touch mobile devices at no charge through Apple's iTunes store by searching for "Browning V-belt."