AptBackup say's it will make a list of your installed apps. And puts it in a location under the iTunes backup. So when you sync on iTunes, the file is stored with the backup. So when you restore you phone, you just reinstall AptBackup and it will reinstall all apps back on to the phone. You can also set it up for phone and use it as a template for setting up others with one click. Although it will NOT, back up the actual app or its settings. Backup your springboard file placement. You cannot restore a backup "whenever". It's only for restoring after a fresh iTunes installation.