Rappio is a digital audio advertising platform which gives Measurable ROI to Advertisers and Monetary benefit to users. Rappio replaces the ringtone of users mobile phone by a brand/advertisement jingle and the end benefit of this change to the user is that he/she earns money on the go for every incoming call. The main purpose of Rappio as a Digital Audio Advertising Platform is to give brands a new platform to market themselves and create a new category in digital space. With this in mind, we explored the idea of advertising using smartphones in such a way that it also benefits the users. Our big idea is to bring something unique in the digital audio advertising space. Rappio App Download Link : https://play.google.com/store/apps/details?id=com.rappio.earnfreerecharge&hl=en