Managing Payroll On the Go A look at a new mobile payroll app for the iPhone, and soon the iPad.

Payroll apps may not knock Angry Birds out of the sky anytime soon, but the fact that there are at least three payroll apps for the iPhone alone shows how viable the idea of managing a small business on the go has become.

The latest mobile payroll app to make a splash is Automatic Data Processing's RUN, which was launched last fall for the iPhone and iPod Touch and will soon arrive for the iPad. RUN Powered by ADP follows SurePayroll--which claims to have been the first mobile payroll app overall--and Intuit Online Payroll as the third payroll app to target the iPhone's constituency of small-business users. These payroll apps are adapted from widely used Internet payroll sites.

Like SurePayroll and Intuit, ADP's iPhone app is free--but for you to use any mobile payroll app, your business needs to be using that vendor's online payroll service, so that likely will be your deciding factor.