According to a letter from Tim Cook, posted by 9to5mac, Apple has reached a settlement with the FTC over in-app purchasing. Apple solicited the claims after hearing complaints of in-app purchases that occurred without a parents permission. In response, the company emailed every iOS user that had made an in-app purchase in an app designed for children, 28 million accounts in total. Of those 28 million, 37,000 responded with claims and were reimbursed for their purchase.