Original image on left, click on the opposite image to identify differences. No time limit.
(Please note that this resource is available in the following formats: swf, pdf & html).
Note: Ensure once downloads are unzipped that you keep ALL files in its folder and run one of the formats above. For html format pls run Index file or drag into URL bar in your browser. Seems to work best in Firefox, IE, Microsoft Edge or Safari.
This resource is free, but I would appreciate your constructive feedback, many thanks.