Its a pretty simple affair to backup data from self installed apps, anything that is not stored on the internal or external SD is all stored in the /data folder of your device. Any non root backup app has access to this folder, or any file explorer for that matter. You can save a few steps of downloading, installing, and executing an app and just copy/paste the /data folder to one of the sd's (this is basically all a backup app is going to do, with the added possibility of compression and md5 checksums), jack in to a pc, copy/paste to desired location.
SGS3 i747 sporting Task650 AOKP(Jellybean 4.3) backed by KT747 kernel
If I have helped you a THANKS is appreciated but not expected, and if a problem was solved a [SOLVED] tag in your post title helps better the community
Samsung Moment>Samsung Galaxy S Captivate>Samsung Galaxy SII i777>Samsung Galaxy SIII i747