Level = Basic
tools = APK Editor Ultra ,Paint.net , Memu

The video is to show how easy it is to swap images out of an APK in this case IBO but almost any APK can be handled in this way.
Make sure the version of Apk Editor signs the apps correct there are a lot out there that do not.
All tools are free of charge.
In the video I am using a version of IBO that i have customised to show .png images rather than .xml images you normally find in this app.
Swapping .xml to .png is another video and at the intermediate level this is just to show how easy it is swapping images in almost any app.
The main reason people will want to swap images is for the logos etc. this is perfect for doing that.

NB. I would only use this tool for ripping and replacing images and name changing nothing else