James Thomson on Friday updated his iPhone and iPad app, PCalc, adding several new features and making some interface tweaks.

[ad#Google Adsense 300×250 in story]For iPad users, the biggest change in PCalc 2.3 is an improved interface. According to Thomson, you can now display the tape, registers, and RPN stack onscreen all the time on an iPad in landscape mode.

Other changes in PCalc include the tape and registers now reflect the appearance of the current theme; emailing of tape and registers has been improved; added an option to show an editing cursor when entering numbers; and added new force and temperature unit conversions, among other changes.

Significant speed improvements were also made in this version.

PCalc is a universal app for iPhone and iPad and costs $9.99. It’s available to download from the App Store.