There's a brand new app on the block with a perfect name, Ruffle (because it's about to do just that to your feathers). This app was made for image sharing, and that's just what it'll do. You'll send images (most likely photos you've taken) to completely random strangers*, and in return you'll receive photos from completely random strangers. When you see a photo incoming, you'll see it pixelated. If you don't want to de-pixelate it, you don't have to.