Why ?

When I needed to do a calculation, I was allways disappointed with the simple calculators and found the spreadsheets to be too heavy and complex
for my needs.

powerCalc is beetween them

pro calc :easy to run

lightweight

free

cons calc: keyboard useless

can't save/share

no variables

can't re-run calculation with different values

no mathematical functions

pro spreadsheet :can save/share

variables

can re-run calculation with different values

mathematical functions

not free

cons spreadsheet: difficult to run

heavy

cannot edit easily saved calculations

nothing exist to share calculation or to build a library

easy to run

lightweight

can save/share

variables

can re-run calculation with different values

mathematical functions

edit easily saved calculations

share calculation or to build a library

free