Minus Degree Mobile has launched its Melodigram mobile messaging app for iOS. The platform enables users to augment mobile photos with spoken dialogue and music tracks from their own library, and then share their Melodigram with friends across social networks.

Users can also send Melodigrams via SMS text or email. There are no sign-up or usage fees for the service. The company previously raised $1 million in funding from public and private sources in Europe in the second half of 2013.

The app will initially be targeted at 16-25 year old iPhone users in Europe, the US, China, India, and Russia. The app is optimized for mobile audio mixing and messaging for consumers, and can be customized for mobile marketers keen to deliver audio messages through social networks.

“The mobile moment is best framed as a shared experience, and Melodigram helps users capture the moment, add the feeling, and share it instantly,” said Jonathan Massey, founder and CEO of Minus Degree Mobile. “We wanted to create an elegant app that would enable users to deliver the kind of produced mobile experience that says ‘wish you were here’ with a level of variety that curates an expressive mash-up for friends.”