Portio Research has released a report on the apps market, with growth forecasts for the next four years. 

Disruptive Mobile Applications and Services 2011-2015 offers market size forecasts, and focuses on “disruptive” applications and services such as mobile video, social networking, VoIP, bulk messaging services, and mobile payments. 

Portio says that the report addresses the fact that network operators are turning to value-added services to boost profits, because of the threats their businesses under as a result of these disruptive technologies. 

The report profiles all the major app stores, and offers case studies on popular apps such as Angry Birds, MobiTV, YouTube, Facebook, Twitter, Skype, and Bango. It offers statistical analysis of downloads, mobile application user base, smartphone shipments, and application revenues. 

Prices for the report start at £1,495 for a 1-5 user team license. Head to the Portio Research website for more information.