CplxCalPro, CCP, is the most powerful programmable graphicalcalculator for the palm platform.
While this calculator is not necessarily designed just to balance your checkbook, you could easily do so. CplxCalPro allows you to perform the most advanced calculations and function graphing without any programming. The manual contains a step-by-step tutorial with very easy to follow examples.

Don't spent hours writing a program for some programmable calculator while MtrxCal can perform the same calculations with just a few simple lines. Don't waste time trying to find the right maximum and minimum values for plotting your functions. Just let MtrxCal use its build-in auto-scaling feature. The syntax for adding two values and adding two matrices containing hundreds of values is the same.