Mobile BASIC is intended to be used as a personal productivity tool for creating small programs for your own use. It is possible to copy the BASIC program files and pass them on to a friend or colleague but they will only be able to run the program by installing their own copy of Mobile BASIC - it is not possible to convert the files to a standalone APK.
ProCalc BASIC program files can be copied to and from your desktop system by storing the program file on the SD card. Once it is on the SD card you can mount your Android devices on your desktop system using a USB connected drive. You can then use your desktop systems text editor to edit your ProCalc BASIC program.
ProCalc BASIC is stored in an XML based format however it is quite easy to convert your file into the necessary format. Simply make sure that the bold lines are added to the start and end of your file exactly as shown. The bold italic inbetween <KeyName> and </KeyName> is the name that gets displayed on the ProCalc program key.
<?xml version="1.0" encoding="UTF-8"?>
FUNCTION SQR(X AS DOUBLE) AS DOUBLETEST = X * X