Aepryus Calculator Cost: $20 Get the full version     Trial version     Developer's Website Contacting third-party download site please wait. If your download does not start, click here, or get the full version Descriptions Aepryus Calculator: Aepryus Calculator is a scientific RPN calculator. It features Always OnTop Option, Very Small Screen Size, intuitive key placement and a clever memory function. It sports the standard scientific functions, as well as Octal, Decimal and Hexadecimal modes.