Great app. Does what is says in the tin, so no complaints. My only feedback would be to have a video on how to best use it or a user manual. Once you get it, it’s easy and super quick to add every photo, but the first few minutes I was a bit confused and gave up for a while. Then I tried again with an actual roll of film in my camera and it all clicked. It would be great to have a video showing how the developer uses it. It’s clearly built to scratch a personal itch.