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 precise targeting by time, region, gender, age and more. It is an effective way to create brand awareness and viral activity at a lower cost than traditional media like radio.