Ashland City, Tenn.-based maker of water heaters and boilers launched the A.O. Smith Warranty Check app for contractors and plumbers for use in the field. 

"The iPhone and Android have created a huge demand for on-the-go information from homeowners and professionals," said Matt Southards, senior manager of digital marketing and strategy for A.O. Smith. "As an industry leader, we want to provide our plumbing professionals with easy access to critical information from remote locations."