Turn on the free Not Hotdog app, take a photo of something, and the app will tell you if the item you shot is a hotdog or not. Despite the fact that this app is just one big joke, it actually works. It can identify hotdogs and things that are not hotdogs. The reason Apple allowed this pointless and silly app is because it is a joke from the HBO series “Silicon Valley” in season four. There is an app that identifies hotdogs in an attempt to be food’s answer to Shazam, and that is why this app exists.