This was my weekend (really a few hours) project. I am learning photography and occasionally want to post an image online for my friends to see. While I do this

This was my weekend (really a few hours) project. I am learning photography and occasionally want to post an image online for my friends to see. While I do this, I'd like to watermark these images with my own logo. Sometimes I post from my computer, sometimes from my phone (Pixelmator for iOS works wonderfully). Instead of having separate solutions for all this, I decided to create a simple web app that would allow me to do this. The advantage of my thing is that your watermark is saved on S3 and protected by a secret URL. No accounts to create, no passwords to remember. And the images, originals or watermarked copies are never saved. Let me know what you think.