Pia (25) made mobile app for sex workersPia Poppenreiter, a 25-year-old Austrian with a master's in business ethics, launched Germany's first mobile app for sex workers in 2015. The app allows sex workers to advertise their services. Poppenreiter has no personal experience in sex work.Norway · 2015-02-01 · VGRead the original report at VG · Project Sesha — the live map