LandscapeCalc is a tweak released during this night in Cydia, and with its author we can block the orientation of the application Calculator after a first orientation. Specifically, after rotating the application to display the computer in Landscape Mode, tweak- will automatically lock this orientation to display all the options that are not normally visible in portrait mode. LandscapeCalc it is available for free in the repo BigBoss al Cydia and should work on any iDevices.
