app update charge a $1.00 a piece for 3 updates, why?
Apple charge me $1.00 to updating this app and two others, Why?
iPod touch, iOS 6.0.1
You aren't charged for updating apps. If you added or changed your credit card details at the same time as downloading the updates then you will probably have received a temporary store holding charge, which is made to check that the card details are valid and that the card is active - it should disappear off your card within a few days (though it may take longer due to the weekend).