Cummins Inc. has released a free QuickServe Online (QSOL) mobile app for Apple iOS devices. The QSOL mobile app provides access to Cummins part options, parts catalogs and engine dataplate information for 15 million Cummins engine serial numbers (ESNs). It also includes a fault code analyzer for Cummins electronic engines, providing specific fault code details and analysis. The free QSOL mobile app is available globally for download in the Apple Store by searching for “QuickServeMobile.” QSOL is continually updated with the latest Cummins parts and service information, allowing mobile app users to find the right part number or fault code information. A version for Android devices is under development, according to the company.