Macworld has an easy way to create an automatic, sequential backup of your iOS apps

Chris Breen shows you how to create a simple Automator action that will automatically backup your iOS apps every time iTunes downloads updates for them. This is perfect for avoiding “The Twitter App Effect,” where a major update takes one step forward, but two huge steps back.

This action will even create sequential backups of your apps, so you can hang onto (and roll back to) any previous version you’ve downloaded.