StratosHear is revolutionizing mobile advertising by playing audio ads on phones even if a call is incoming or ongoing. The ads continue playing until the call is answered. This results in uniform ad impressions throughout the day unlike TV or radio. Impressions under 5 seconds are free. StratosHear offers targeted mobile ads based on time, region, gender, age and more. It can reach millions of users through premium mobile publishers and has inventory from top handset manufacturers, operating systems and apps. The network serves over 1 billion impressions and offers various interactive ad formats like expandable banners and click-to functions.