 <p>There is no such tool in existence which can perform above specified tasks.</p> <p>You can easily find tools for capturing screenshots, but you will be not able to view changes done after a specified time. You need to develop a crawler to perform this task. You can pick PHP or .net as technology to handle this task.</p> <p>In case, you have any query, you can let us know anytime.</p> <p>Thank You</p>