The idea to create the HUDCalc app came about when the author was frustrated trying to do his finances and the calculator always went behind other app windows. After seeing other apps that used the Mac OS X HUD window, the author created his own app that puts a calculator in a HUD window and HUDCalc was born.

The idea to publicly release the HUDCalc app came after the author was listening to The Mac Observer’s Mac Geek Gab and another listener had the same problem. This made him decide to release the app for others who were frustrated.