2024-07-29 00:00:00 HARZwert is a free voucher app for the entire Harz. In addition to excursion destinations, cafés and restaurants, hotels and shops are also partners of HARZwert. The aim is to present the entire Harz with all its multifaceted and unique offers across borders in one app. HARZwert can be used free of charge by residents and tourists alike.