cs-41 RPN calculator 6.4

The cs-41 app contains near all the built-in functions of the original HP-41C (including sounds) and the ability to save and restore limited programs in "module" files, so you can modify routines, start new ones, erase the memory, quit and reopen the app without worry - the saved modules will remain intact. With this new release, the app fills a lack that could difficult it's usability if you want to make and reuse your own programs or routines.