I was skeptical at first, but after reading the article to the end I think this may actually be one that works.
External Link/Members OnlySimply put; you have a private (non-public) profile not unlike Tinder/Grindr on Ohlala. You enter your location, preferences in service, price you're willing to pay and then send that 'reverse booking' out to WGs in your area who are also on the app. They then choose to contact you and reveal their profile, or not. Each escort is apparently verified by the company (potential bottle neck and weakness here, not to mention bait and switch later down the line). The aim is to improve communication, service/expectation and cut out the middle man.
I know this sort of thing has been tried before and people prefer using sites without having an online account or profile (you could still use a punting phone and create a fake profile), but there seems to me to be room for a layer above the murky world of AW where people just want to stop faffing about and get appointments booked without spending hours trawling the internet.
The difference with this app is it's legit. This isn't a clandestine like Adultwork outfit operating out of HK or wherever it is based now, it's a start up in Berlin that's not ashamed about how it's going about things. That's good.