From Roy Perry:
After activation from your Hack Manager, Uninstall Hack monitors installed applications for writing preferences and files. Some applications leave remnants after using the standard delete tool to remove them. Uninstall Hack helps you completely remove applications and keep your device clean and trouble-free. When using Uninstall Hack to uninstall an application that has been monitored, the application will be removed from your device without a trace. You can also delete remnants that were left by applications when using the standard delete tool, which only deletes files and preferences that were saved under the same Creator ID (that of the application). The program also includes a free cleanup tool to find and remove orphaned preferences.