If the filters on Instagram and other photo editing apps just don't do it for you, there's now Spring. The app lets users stretch out photos of themselves so they appear taller and thinner. The app's description says it wants to "help you adjust your body proportions" so "your body looks sexier."
Users just pick two or three spots on their body in the area they want to stretch, and then the app does the work and keeps everything proportional. Still, it's possible to stretch out the background of the photo and make the alterations obvious.