In portraits, we’re well aware of the role physical proportions play on how a subject looks. Generally speaking, longer legs, an elongated neck, and other such physical attributes dramatically affect the aesthetic quality of portraits for many, be it subconsciously or not. And while ethics are rightfully called into questions when changing these proportions in Photoshop, it’s continuously done.

Looking to take this questionable practice and capitalize on it in the mobile market, developer Kim Taewan has created an application for both Android and iOS called Spring.

Spring’s goal is to “help you adjust your body proportions,” according to its app description. By utilizing a rather unique and simple method of overlaying lines onto the hips, shoulders and ankles of yourself (or a friend) in a portrait, the app automatically alters the physical proportions of the subject, presumably to a more appealing ratio.

As you could expect, with the warping of the subject, the background also gets slightly adjusted, which could make for some awkward ‘Photoshop’ fails if you’re not careful. Beyond the obvious background issue at play, the only position that really works with this is a straight-up, front-facing portrait, which most mobile photos aren’t.

The app is free to download and take for a spin, but to export any high-quality images, you’ll need to make an in-app purchase. You can find the app on both the iOS App Store and the Google Play Store.