title: How can I make my own crop-image app visible to some other app that looks for crop-image apps?
body: <p>I'm using someone's photo app which can send a photo to a cropper by opening up a list of cropping tools found on my device for me to choose. It currently shows "Gallery crop" and "Photos Crop". How can I add my self-made cropping app "Super crop" to show on this list? Would my super crop app have to be a root app like Gallery and Photos?</p>