Apple's one-year limited warrantee and the AppleCare Protection Plan cover physical damage to your device, including broken screens, cracked cases, and any inherent defects. The one-year limited warrantee is part of the purchase price of the iOS device. The AppleCare Protection Plan extends this service for an additional year and must be purchased during the one-year limited warrantee. Prices for AppleCare are as follows: iPhone: $69, iPod touch: $59, and iPad: $99. For more details on these plans or to purchase them, visit Apple's website (apple.com/support/products).
Apple also provides service for iOS devices that are no longer covered by a warrantee.