"...the most accurate scale weve tested in the App Store."
Precision Gram and Ounce Scale
Using just your iPhone / iPod Touch, a paper clip, and a nickel!
Current range is:
*** 0 - 15 grams within 0.2 grams accuracy or
*** 0 - 1/2 ounce within 1/32 ounce accuracy
*** Extended range capability is in development