A cracked/damaged screen is not covered by the one-year limited warranty (or) the AppleCare Protection Plan. It is considered accidental damage and thus not eligible for a free replacement/service under the terms of either. That being said, your renter's or home owner's insurance might be able to offer service/replacement coverage if personal electronic items are covered. In addition many major credit cards offer additional warranty/coverage options within the first X (it varies) of ownership. You would need to reach out to those specific coverage options yourself, however.