Calculator Expert is a new app for solving the problem of complex calculations. It’s available for Mac OS X (10.6 and higher) and the iPad. The OS X version costs US$0.99 and is available at the Mac App Store. The iOS version costs $4.99 and is available at the Apple App Store.
Calculator Expert uses a special mathematical library instead of the standard module. It t saves all the computations it has makes. You can clear all the history or erase the unimportant calculations at any time.
You can also use the computation history for further calculations. For example, you could triple your normal tips if you’ve invited someone for the lunch. You could simply copy and paste a number from your history if you want to use it in further calculations.