Calculate Plus/Minus Lite (CalcPMLite) is a simple calculator with in-built uncertainty (error) handling. Uncertainties are combined based on the method of standard uncertainties. CalcPMLite operates in traditional input format (BOMDAS). Uncertainty usage can be disabled for standard calculator operation.
This is the free version of the more advanced CalcPM - a full scientific uncertainty (error) calculator. CalcPM is available for minimal cost through the Google Play store.