Ohlala app for escorts

An app called Ohlala launched in Germany earlier this year in a bid to take the Tinder-style concept of meeting people and setting up dates a step further – by letting woman set a price for men to go out with them.

Describing the app in an interview, the founder said it's in between an escort service and a dating app. "We don't know what is happening on the dates, so I can't confirm that it's an escort service. When the matching is taking place, all of what is happening is agreed upon in the chat," Pia Poppenreiter, chief executive of Ohlala, told CNBC.

Women are able to sign up to the service, upload a profile, add their preferences and a minimum price. Then a man can search for what he is looking for.

Currently the service has 13,000 people signed up and Poppenreiter said there are 10 men to one woman, adding that "the dynamic works well." Ohlala launched in Berlin in August and is available in an additional three German cities.