The 10BA Financial Calculator works like the industry standard financial calculator such as the HP 10B, HP 10BII, or the HP 10BII+ emulator; however, we add tons of unique features that makes this app be the most convenient financial calculator that you have ever used. Single-Access Key No need to use a shift key to access the yellow or the blue functions. The Single-Access Key feature enables you to activate the yellow and the blue functions quickly and conveniently. Integrated Cheatsheet No