Apple Inc. (NASDAQ:AAPL) was considering buying out AdMob before Google swooped in and picked them up for $750 million in stock. Apple contacted AdMob several weeks before the Google acquisition according to Bloomberg.
AdMob is a major mobile advertising company that integrates advertisements into iPhone and Android applications. Generally applications that are free tend to have built in AdMob advertisements. After buying out AdMob, Google has become the largest mobile ad company.