Web service retouch photo online

You need to create a website for photo retouching online. The service should allow you to perform retouch photos online in both automatic and manual modes. There is an example site for photo editing, even 2, but in one only automatic photo editing, and in the other only manual - in the new service, online photo processing must be carried out in two modes. And after automatic should be possible manual fitting of the photo, and after manual - again automatic. It is necessary to make sure that the user does not limit anything in the choice. I plan to monetize the site exclusively through automatic retouching, manual mode should be free. After automatic retouching, the user should be shown the final photo with watermarks, which can be removed only after payment. In the payment system, I rely on your choice.