A survey of iPhone Calculators

For many years, I had a single iPhone calculator app, PCalc. It has worked well for the programming operations I typically do (hex conversion, bitwise math, and the like) and makes a great general-purpose calculator. I even follow the author, @jamesthomson, on Twitter because he often has insightful things to say about iOS applications. Some … Continue reading A survey of iPhone Calculators

On the usability of virtual pre-paid gift credit cards

Recently, I found myself in possession of a $20 “virtual” Visa gift card. ┬áTo make a long story short, I found the Wolfram Alpha iPhone app useful enough to spend $20 on it when the price dropped from $50, but then it later dropped to $2 and Mr. Wolfram decided to issue refunds to those … Continue reading On the usability of virtual pre-paid gift credit cards