Use your iPod Touch or iPhone as a scale!
Digital Scale turns your iPhone/iPod Touch
into the best digital scale. You can weigh almost every small object such as coins and jewelery with perfect scale.
Instructions:
Remove all accessories from your iPhone/iPod Touch, then balance it on your finger, on top of the balance bar. At this point the display should read 0 grams. Place the object that you wish to weigh in the tray, and then the approximate weight will be shown in the top box.