The application relates to an applicator system (1) for applying a viscous liquid, in particular a transdermal pharmaceutical formulation, to the human skin comprising a metering dispenser (2) in turn comprising a container holding the viscous liquid and a pump (5) for metering the liquid and an applicator (3) detachably connected to the dispenser (2) and comprising an application surface (6) for receiving a metered amount of the liquid from the dispenser (2). The application surface (6) is convex.
