Show HN: DpiApp – App to Watermark the Design and Send to Client (Ruby on Rails)

Hi, I'm printfinn, a mostly self-taught software engineer, this is a web app I made in the last 2 months with Ruby on Rails, ERB, Heroku, S3 and Cloudfront. I made it because graphic designers sometimes get "ghosted away" by first-time clients after they hand out the original design image files. This app can automatically add watermark and adjust resolution before images are presented to the client. I hope it makes the designer's job easier, and hopefully, get designers paid. Any suggestion is welcome especially from designers!