Digital multimeters manuals usually provide the measurement precision in the form:
+/- (percentage + number of digits)
Do you really know what is the actual error of your multimeter when measuring a specific voltage or resistor?
This app allows you to calculate it in a matter of seconds.
It supports more instruments, more measurement types for each instrument and more ranges for each measurement type.
Simple but effective.
Go to the settings section, enter your multimeter ranges and precisions and you are good to go.