The iPhone 7 Plus comes with a dual rear camera and a new Portrait mode that creates a faux depth-of-field effect for, well, portraits. If you don’t have that version of an iPhone, there’s an app that replicates that. Called Patch, the app makes use of neural networks to analyze a photo and determine the subject matter. It’s not as serious a tool as you would expect, it’s more a fun thing to play around with. And since developers anticipated it won’t always accurately find the outline of your subject, you can adjust the mask manually by highlighting or erasing areas affected by the blur. It works best when taking a picture of a person straight on. The app comes with an in-app purchase option ($0.99) to get rid of the tiny watermark Patch adds to the photos you edit on it.