From the developer of iBend Pipe:
*Compatible with iOS 7.0 and above.*
Pipe N Wire is a simple to use conductor fill calculator, based on the NEC tables.
Pipe N Wire allows you to choose different fill percentages.
Pipe N Wire remembers your previous selections to save you time.
Pipe N Wire allows you to override the recommended pipe size.
Pipe N Wire saves your calculations for future reference.