iTrasher by Boolex

No. It will only scan the posts table. The posts table is where images are stored by default. So it's safe to say that most of your images will be found.

• firstly, it checks the value of the parent_id - 0 means no parent
• secondly, it checks whether the image is set as featured
• if no parent id and it's not set as featured, then we can add this image to our unused images container
• the checking does not stop here, you might have some other plugins that are using your images, so in this case we need to perform a final check
• this final check ensures that this particular image is not used elsewhere, so the plugin will scan all tables and columns in your database and find every occurence of the image

Yes, Estatik plugin stores images differently in a different table. Our plugin is able to find these images.

If you think images uploaded via these plugins are not found by our plugin, then a customized solution might be a better fit. We can create an extension that suits your needs for only $30/hr. To discuss, just contact us at http://boolex.com/contact-us.