Nokia Xpress service has been in beta testing for quite some time, but Nokia has recently finished the development. The final version of the app is now available for free at the Windows Phone Store.
Nokia Xpress uses cloud services to compress browsing data and saves up to 85% of the mobile traffic.
In addition to the data compression, Nokia Xpress allows you to save web pages and read them later. It also supports a magazine service that collects all your favorite articles.
As I said above, the app is free and is now available for every Windows Phone 8-powered Lumia.