By Mike Riley
The calculator app that comes bundled in iOS is adequate for basic, quick calculations, but it lacks even a simple memory function or running history of operations. Hundreds of alternative calculator apps, both free and paid, are available from the App Store. But when you want the best, the absolute top of the category, PCalc ($9.99) from TLA Systems claims that it's the one to beat. Let's find out if that's the case.