This is what AppZapper has to say about their app:
Everybody loves the drag and drop nature of OS X. Drag an app into your applications folder, and it's installed. You'd think it would be that easy to delete an app — just a matter of dragging it to the trash. But it's not. Apps install support files on your computer that generate clutter. Introducing AppZapper. Simply drag one or more apps onto AppZapper. Then, watch as it finds the extra files and lets you delete them with one click.
Just like Ronseal it does exactly what it says on the tin. Sure some of the newer extra features aren't the best but they do add value to the app. If you need an uninstaller for OS X then you can't go wrong with AppZapper
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