James Thomson has decided to release PCalc 2.4 following indications earlier today that he was considering delaying its release due to a series of widespread patent claims against Thomson and several other iOS developers. PCalc 2.4 adds several new features including a “Frac” button on many layouts for faster fraction entry and swap buttons in the conversion section for quickly setting the base unit. Support for several new unit conversions has also been added including lighting units such as lumens and footcandles and inches and millimetres of mercury and water for pressure conversions. Users can also now choose to disable auto-lock while using the app and several new digit styles have been added and improved along with numerous other small fixes and enhancements.
PCalc is available in two versions: PCalc Lite Calculator is a free version that provides advanced calculator functionality including an optional RPN mode, basic unit conversions and two themes, with additional options available via in-app purchase such as engineering and scientific notation support, hexadecimal, octal and binary calculations and additional themes. Alternatively, users can purchase the full version, PCalc RPN Calculator for $10 which includes all of the optional modules. Both versions are universal apps supporting the iPhone, iPod touch and iPad.