Counting Coins App for iOS
"Counting Coins lets you practice working with U.S. pennies, nickels, dimes, and quarters. You can play in four modes:
(1) Match the Value: Try to make the same value as the coins shown using a different combination of coins.
(2) Make the Total: Use coins to make the total shown.
(3) How Many Cents?: Type the value of the coins shown.
(4) Show Values: Drag any amount of coins and show or hide the value."
This is a free app