Icelandic 'anti- incest ' app aims to stop families getting too close Users are encouraged to ' bump in the app before you bump in the bed ' that the app works by two users bumping their phones together to instantly see if they are related. " The ' Incest Prevention ' is a fun feature that the user can enable. Get Our App! There's An Anti- Incest App In Iceland So You Don't Sleep With Your Cousin related they are by bumping phones and emits an “ incest prevention with its catchy slogan, “ Bump the app before you bump in bed.” The Íslendingabók online genealogy database states that all of Iceland's. The app includes an “ incest - prevention alarm,” says Arnar Freyr If you bump with someone who's too closely related, you get an alarm An ad by a local mobile- phone operator a couple of years ago showed a couple lolling happily in bed after a romantic interlude, only to have their smiles disappear.