A smart phone app for iPhone and Android shows men how the size of their penis compares to other men’s in the world. According to U.K. technology magazine TNT, the app is designed to help men find a better fitting condom.

The American Sexual Health Association has said that poor-fitting condoms are a leading reason why some men prefer not to use them. While most men are comfortable using condoms, men who find them too loose or tight or too short or long tend to use them less often, contributing to the spread of sexually transmitted diseases. A study published by Indiana University sex researchers said that the belief that sex is more pleasurable without a condom is actually a myth.