Yes, someone has released an iPhone ‘purity ring’ application:

The iPhone has applications for almost everything, from helping people to choose the best wine for a meal to locating supermarkets in Holland. Now there is one to help them to stay chaste until marriage.

For just 59p, consumers can download an application that allows them to take a purity pledge and then display a silver ring on their phone to prove their commitment to abstinence.

I would note that people who take purity pledges are more likely to engage in oral sex, anal sex, unprotected sex, and parenthood, so the mind boggles at what sorts of risky behavior that this application will engender.

H/t Jessica Valenti