I built an image sharing utility connected to a friend's service, because I wanted to be able to directly share an image from anywhere on my phone without going on his website.
Nice. I was actually looking for a simple image host with an API that I could use for a personal project, and didn't know about Pix. Ended up using Cloudinary, which is way overblown for my needs. Maybe I'll make an iOS port of your app!
https://pix.artemix.org/