Opera is working in a new service called Opera Max that will help you save data on all your apps, not just the browser. It compresses data for every image, video and text file downloaded to your device regardless of the application downloading it.
It works by installing the Opera Max application on your Android device. The app configures a VPN server on your device and routs all your data through it. The server will compress all data before sending it to your device, thus saving your data and time. This works for all apps except those that use https, so any secure content such as online payments and mail services won’t be compressed.
The service is currently in beta and Opera is looking for people in the US to test it out for them. You will find the instructions to sign up for it and the download link for the app in the source link below.